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e1000e: call ndo_stop() instead of dev_close() when running offline selftest
[deliverable/linux.git] / drivers / net / ethernet / intel / e1000e / netdev.c
CommitLineData
e78b80b1 1/* Intel PRO/1000 Linux driver
529498cd 2 * Copyright(c) 1999 - 2015 Intel Corporation.
e78b80b1
DE		 3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * The full GNU General Public License is included in this distribution in
14 * the file called "COPYING".
15 *
16 * Contact Information:
17 * Linux NICS <linux.nics@intel.com>
18 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
19 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
20 */
bc7f75fa 21
8544b9f7
BA		 22#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
23
bc7f75fa
AK		 24#include <linux/module.h>
25#include <linux/types.h>
26#include <linux/init.h>
27#include <linux/pci.h>
28#include <linux/vmalloc.h>
29#include <linux/pagemap.h>
30#include <linux/delay.h>
31#include <linux/netdevice.h>
9fb7a5f7 32#include <linux/interrupt.h>
bc7f75fa
AK		 33#include <linux/tcp.h>
34#include <linux/ipv6.h>
5a0e3ad6 35#include <linux/slab.h>
bc7f75fa
AK		 36#include <net/checksum.h>
37#include <net/ip6_checksum.h>
bc7f75fa
AK		 38#include <linux/ethtool.h>
39#include <linux/if_vlan.h>
40#include <linux/cpu.h>
41#include <linux/smp.h>
e8db0be1 42#include <linux/pm_qos.h>
23606cf5 43#include <linux/pm_runtime.h>
111b9dc5 44#include <linux/aer.h>
70c71606 45#include <linux/prefetch.h>
bc7f75fa
AK		 46
47#include "e1000.h"
48
b3ccf267 49#define DRV_EXTRAVERSION "-k"
c14c643b 50
d2d7d4e4 51#define DRV_VERSION "3.2.6" DRV_EXTRAVERSION
bc7f75fa
AK		 52char e1000e_driver_name[] = "e1000e";
53const char e1000e_driver_version[] = DRV_VERSION;
54
b3f4d599 55#define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
56static int debug = -1;
57module_param(debug, int, 0);
58MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
59
bc7f75fa
AK		 60static const struct e1000_info *e1000_info_tbl[] = {
61 [board_82571] = &e1000_82571_info,
62 [board_82572] = &e1000_82572_info,
63 [board_82573] = &e1000_82573_info,
4662e82b 64 [board_82574] = &e1000_82574_info,
8c81c9c3 65 [board_82583] = &e1000_82583_info,
bc7f75fa
AK		 66 [board_80003es2lan] = &e1000_es2_info,
67 [board_ich8lan] = &e1000_ich8_info,
68 [board_ich9lan] = &e1000_ich9_info,
f4187b56 69 [board_ich10lan] = &e1000_ich10_info,
a4f58f54 70 [board_pchlan] = &e1000_pch_info,
d3738bb8 71 [board_pch2lan] = &e1000_pch2_info,
2fbe4526 72 [board_pch_lpt] = &e1000_pch_lpt_info,
79849ebc 73 [board_pch_spt] = &e1000_pch_spt_info,
bc7f75fa
AK		 74};
75
84f4ee90
TI		 76struct e1000_reg_info {
77 u32 ofs;
78 char *name;
79};
80
84f4ee90 81static const struct e1000_reg_info e1000_reg_info_tbl[] = {
84f4ee90
TI		 82 /* General Registers */
83 {E1000_CTRL, "CTRL"},
84 {E1000_STATUS, "STATUS"},
85 {E1000_CTRL_EXT, "CTRL_EXT"},
86
87 /* Interrupt Registers */
88 {E1000_ICR, "ICR"},
89
af667a29 90 /* Rx Registers */
84f4ee90 91 {E1000_RCTL, "RCTL"},
1e36052e
BA		 92 {E1000_RDLEN(0), "RDLEN"},
93 {E1000_RDH(0), "RDH"},
94 {E1000_RDT(0), "RDT"},
84f4ee90
TI		 95 {E1000_RDTR, "RDTR"},
96 {E1000_RXDCTL(0), "RXDCTL"},
97 {E1000_ERT, "ERT"},
1e36052e
BA		 98 {E1000_RDBAL(0), "RDBAL"},
99 {E1000_RDBAH(0), "RDBAH"},
84f4ee90
TI		 100 {E1000_RDFH, "RDFH"},
101 {E1000_RDFT, "RDFT"},
102 {E1000_RDFHS, "RDFHS"},
103 {E1000_RDFTS, "RDFTS"},
104 {E1000_RDFPC, "RDFPC"},
105
af667a29 106 /* Tx Registers */
84f4ee90 107 {E1000_TCTL, "TCTL"},
1e36052e
BA		 108 {E1000_TDBAL(0), "TDBAL"},
109 {E1000_TDBAH(0), "TDBAH"},
110 {E1000_TDLEN(0), "TDLEN"},
111 {E1000_TDH(0), "TDH"},
112 {E1000_TDT(0), "TDT"},
84f4ee90
TI		 113 {E1000_TIDV, "TIDV"},
114 {E1000_TXDCTL(0), "TXDCTL"},
115 {E1000_TADV, "TADV"},
116 {E1000_TARC(0), "TARC"},
117 {E1000_TDFH, "TDFH"},
118 {E1000_TDFT, "TDFT"},
119 {E1000_TDFHS, "TDFHS"},
120 {E1000_TDFTS, "TDFTS"},
121 {E1000_TDFPC, "TDFPC"},
122
123 /* List Terminator */
f36bb6ca 124 {0, NULL}
84f4ee90
TI		 125};
126
c6f3148c
AK		 127/**
128 * __ew32_prepare - prepare to write to MAC CSR register on certain parts
129 * @hw: pointer to the HW structure
130 *
131 * When updating the MAC CSR registers, the Manageability Engine (ME) could
132 * be accessing the registers at the same time. Normally, this is handled in
133 * h/w by an arbiter but on some parts there is a bug that acknowledges Host
134 * accesses later than it should which could result in the register to have
135 * an incorrect value. Workaround this by checking the FWSM register which
136 * has bit 24 set while ME is accessing MAC CSR registers, wait if it is set
137 * and try again a number of times.
138 **/
139s32 __ew32_prepare(struct e1000_hw *hw)
140{
141 s32 i = E1000_ICH_FWSM_PCIM2PCI_COUNT;
142
143 while ((er32(FWSM) & E1000_ICH_FWSM_PCIM2PCI) && --i)
144 udelay(50);
145
146 return i;
147}
148
149void __ew32(struct e1000_hw *hw, unsigned long reg, u32 val)
150{
151 if (hw->adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
152 __ew32_prepare(hw);
153
154 writel(val, hw->hw_addr + reg);
155}
156
e921eb1a 157/**
84f4ee90 158 * e1000_regdump - register printout routine
e921eb1a
BA		 159 * @hw: pointer to the HW structure
160 * @reginfo: pointer to the register info table
161 **/
84f4ee90
TI		 162static void e1000_regdump(struct e1000_hw *hw, struct e1000_reg_info *reginfo)
163{
164 int n = 0;
165 char rname[16];
166 u32 regs[8];
167
168 switch (reginfo->ofs) {
169 case E1000_RXDCTL(0):
170 for (n = 0; n < 2; n++)
171 regs[n] = __er32(hw, E1000_RXDCTL(n));
172 break;
173 case E1000_TXDCTL(0):
174 for (n = 0; n < 2; n++)
175 regs[n] = __er32(hw, E1000_TXDCTL(n));
176 break;
177 case E1000_TARC(0):
178 for (n = 0; n < 2; n++)
179 regs[n] = __er32(hw, E1000_TARC(n));
180 break;
181 default:
ef456f85
JK		 182 pr_info("%-15s %08x\n",
183 reginfo->name, __er32(hw, reginfo->ofs));
84f4ee90
TI		 184 return;
185 }
186
187 snprintf(rname, 16, "%s%s", reginfo->name, "[0-1]");
ef456f85 188 pr_info("%-15s %08x %08x\n", rname, regs[0], regs[1]);
84f4ee90
TI		 189}
190
f0c5dadf
ET		 191static void e1000e_dump_ps_pages(struct e1000_adapter *adapter,
192 struct e1000_buffer *bi)
193{
194 int i;
195 struct e1000_ps_page *ps_page;
196
197 for (i = 0; i < adapter->rx_ps_pages; i++) {
198 ps_page = &bi->ps_pages[i];
199
200 if (ps_page->page) {
201 pr_info("packet dump for ps_page %d:\n", i);
202 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
203 16, 1, page_address(ps_page->page),
204 PAGE_SIZE, true);
205 }
206 }
207}
208
e921eb1a 209/**
af667a29 210 * e1000e_dump - Print registers, Tx-ring and Rx-ring
e921eb1a
BA		 211 * @adapter: board private structure
212 **/
84f4ee90
TI		 213static void e1000e_dump(struct e1000_adapter *adapter)
214{
215 struct net_device *netdev = adapter->netdev;
216 struct e1000_hw *hw = &adapter->hw;
217 struct e1000_reg_info *reginfo;
218 struct e1000_ring *tx_ring = adapter->tx_ring;
219 struct e1000_tx_desc *tx_desc;
af667a29 220 struct my_u0 {
e885d762
BA		 221 __le64 a;
222 __le64 b;
af667a29 223 } *u0;
84f4ee90
TI		 224 struct e1000_buffer *buffer_info;
225 struct e1000_ring *rx_ring = adapter->rx_ring;
226 union e1000_rx_desc_packet_split *rx_desc_ps;
5f450212 227 union e1000_rx_desc_extended *rx_desc;
af667a29 228 struct my_u1 {
e885d762
BA		 229 __le64 a;
230 __le64 b;
231 __le64 c;
232 __le64 d;
af667a29 233 } *u1;
84f4ee90
TI		 234 u32 staterr;
235 int i = 0;
236
237 if (!netif_msg_hw(adapter))
238 return;
239
240 /* Print netdevice Info */
241 if (netdev) {
242 dev_info(&adapter->pdev->dev, "Net device Info\n");
ef456f85 243 pr_info("Device Name state trans_start last_rx\n");
e5fe2541
BA		 244 pr_info("%-15s %016lX %016lX %016lX\n", netdev->name,
245 netdev->state, netdev->trans_start, netdev->last_rx);
84f4ee90
TI		 246 }
247
248 /* Print Registers */
249 dev_info(&adapter->pdev->dev, "Register Dump\n");
ef456f85 250 pr_info(" Register Name Value\n");
84f4ee90
TI		 251 for (reginfo = (struct e1000_reg_info *)e1000_reg_info_tbl;
252 reginfo->name; reginfo++) {
253 e1000_regdump(hw, reginfo);
254 }
255
af667a29 256 /* Print Tx Ring Summary */
84f4ee90 257 if (!netdev || !netif_running(netdev))
fe1e980f 258 return;
84f4ee90 259
af667a29 260 dev_info(&adapter->pdev->dev, "Tx Ring Summary\n");
ef456f85 261 pr_info("Queue [NTU] [NTC] [bi(ntc)->dma ] leng ntw timestamp\n");
84f4ee90 262 buffer_info = &tx_ring->buffer_info[tx_ring->next_to_clean];
ef456f85
JK		 263 pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n",
264 0, tx_ring->next_to_use, tx_ring->next_to_clean,
265 (unsigned long long)buffer_info->dma,
266 buffer_info->length,
267 buffer_info->next_to_watch,
268 (unsigned long long)buffer_info->time_stamp);
84f4ee90 269
af667a29 270 /* Print Tx Ring */
84f4ee90
TI		 271 if (!netif_msg_tx_done(adapter))
272 goto rx_ring_summary;
273
af667a29 274 dev_info(&adapter->pdev->dev, "Tx Ring Dump\n");
84f4ee90
TI		 275
276 /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
277 *
278 * Legacy Transmit Descriptor
279 * +--------------------------------------------------------------+
280 * 0 | Buffer Address [63:0] (Reserved on Write Back) |
281 * +--------------------------------------------------------------+
282 * 8 | Special | CSS | Status | CMD | CSO | Length |
283 * +--------------------------------------------------------------+
284 * 63 48 47 36 35 32 31 24 23 16 15 0
285 *
286 * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
287 * 63 48 47 40 39 32 31 16 15 8 7 0
288 * +----------------------------------------------------------------+
289 * 0 | TUCSE | TUCS0 | TUCSS | IPCSE | IPCS0 | IPCSS |
290 * +----------------------------------------------------------------+
291 * 8 | MSS | HDRLEN | RSV | STA | TUCMD | DTYP | PAYLEN |
292 * +----------------------------------------------------------------+
293 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
294 *
295 * Extended Data Descriptor (DTYP=0x1)
296 * +----------------------------------------------------------------+
297 * 0 | Buffer Address [63:0] |
298 * +----------------------------------------------------------------+
299 * 8 | VLAN tag | POPTS | Rsvd | Status | Command | DTYP | DTALEN |
300 * +----------------------------------------------------------------+
301 * 63 48 47 40 39 36 35 32 31 24 23 20 19 0
302 */
ef456f85
JK		 303 pr_info("Tl[desc] [address 63:0 ] [SpeCssSCmCsLen] [bi->dma ] leng ntw timestamp bi->skb <-- Legacy format\n");
304 pr_info("Tc[desc] [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma ] leng ntw timestamp bi->skb <-- Ext Context format\n");
305 pr_info("Td[desc] [address 63:0 ] [VlaPoRSCm1Dlen] [bi->dma ] leng ntw timestamp bi->skb <-- Ext Data format\n");
84f4ee90 306 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
ef456f85 307 const char *next_desc;
84f4ee90
TI		 308 tx_desc = E1000_TX_DESC(*tx_ring, i);
309 buffer_info = &tx_ring->buffer_info[i];
310 u0 = (struct my_u0 *)tx_desc;
84f4ee90 311 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
ef456f85 312 next_desc = " NTC/U";
84f4ee90 313 else if (i == tx_ring->next_to_use)
ef456f85 314 next_desc = " NTU";
84f4ee90 315 else if (i == tx_ring->next_to_clean)
ef456f85 316 next_desc = " NTC";
84f4ee90 317 else
ef456f85
JK		 318 next_desc = "";
319 pr_info("T%c[0x%03X] %016llX %016llX %016llX %04X %3X %016llX %p%s\n",
320 (!(le64_to_cpu(u0->b) & (1 << 29)) ? 'l' :
321 ((le64_to_cpu(u0->b) & (1 << 20)) ? 'd' : 'c')),
322 i,
323 (unsigned long long)le64_to_cpu(u0->a),
324 (unsigned long long)le64_to_cpu(u0->b),
325 (unsigned long long)buffer_info->dma,
326 buffer_info->length, buffer_info->next_to_watch,
327 (unsigned long long)buffer_info->time_stamp,
328 buffer_info->skb, next_desc);
84f4ee90 329
f0c5dadf 330 if (netif_msg_pktdata(adapter) && buffer_info->skb)
84f4ee90 331 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
f0c5dadf
ET		 332 16, 1, buffer_info->skb->data,
333 buffer_info->skb->len, true);
84f4ee90
TI		 334 }
335
af667a29 336 /* Print Rx Ring Summary */
84f4ee90 337rx_ring_summary:
af667a29 338 dev_info(&adapter->pdev->dev, "Rx Ring Summary\n");
ef456f85
JK		 339 pr_info("Queue [NTU] [NTC]\n");
340 pr_info(" %5d %5X %5X\n",
341 0, rx_ring->next_to_use, rx_ring->next_to_clean);
84f4ee90 342
af667a29 343 /* Print Rx Ring */
84f4ee90 344 if (!netif_msg_rx_status(adapter))
fe1e980f 345 return;
84f4ee90 346
af667a29 347 dev_info(&adapter->pdev->dev, "Rx Ring Dump\n");
84f4ee90
TI		 348 switch (adapter->rx_ps_pages) {
349 case 1:
350 case 2:
351 case 3:
352 /* [Extended] Packet Split Receive Descriptor Format
353 *
354 * +-----------------------------------------------------+
355 * 0 | Buffer Address 0 [63:0] |
356 * +-----------------------------------------------------+
357 * 8 | Buffer Address 1 [63:0] |
358 * +-----------------------------------------------------+
359 * 16 | Buffer Address 2 [63:0] |
360 * +-----------------------------------------------------+
361 * 24 | Buffer Address 3 [63:0] |
362 * +-----------------------------------------------------+
363 */
ef456f85 364 pr_info("R [desc] [buffer 0 63:0 ] [buffer 1 63:0 ] [buffer 2 63:0 ] [buffer 3 63:0 ] [bi->dma ] [bi->skb] <-- Ext Pkt Split format\n");
84f4ee90
TI		 365 /* [Extended] Receive Descriptor (Write-Back) Format
366 *
367 * 63 48 47 32 31 13 12 8 7 4 3 0
368 * +------------------------------------------------------+
369 * 0 | Packet | IP | Rsvd | MRQ | Rsvd | MRQ RSS |
370 * | Checksum | Ident | | Queue | | Type |
371 * +------------------------------------------------------+
372 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
373 * +------------------------------------------------------+
374 * 63 48 47 32 31 20 19 0
375 */
ef456f85 376 pr_info("RWB[desc] [ck ipid mrqhsh] [vl l0 ee es] [ l3 l2 l1 hs] [reserved ] ---------------- [bi->skb] <-- Ext Rx Write-Back format\n");
84f4ee90 377 for (i = 0; i < rx_ring->count; i++) {
ef456f85 378 const char *next_desc;
84f4ee90
TI		 379 buffer_info = &rx_ring->buffer_info[i];
380 rx_desc_ps = E1000_RX_DESC_PS(*rx_ring, i);
381 u1 = (struct my_u1 *)rx_desc_ps;
382 staterr =
af667a29 383 le32_to_cpu(rx_desc_ps->wb.middle.status_error);
ef456f85
JK		 384
385 if (i == rx_ring->next_to_use)
386 next_desc = " NTU";
387 else if (i == rx_ring->next_to_clean)
388 next_desc = " NTC";
389 else
390 next_desc = "";
391
84f4ee90
TI		 392 if (staterr & E1000_RXD_STAT_DD) {
393 /* Descriptor Done */
ef456f85
JK		 394 pr_info("%s[0x%03X] %016llX %016llX %016llX %016llX ---------------- %p%s\n",
395 "RWB", i,
396 (unsigned long long)le64_to_cpu(u1->a),
397 (unsigned long long)le64_to_cpu(u1->b),
398 (unsigned long long)le64_to_cpu(u1->c),
399 (unsigned long long)le64_to_cpu(u1->d),
400 buffer_info->skb, next_desc);
84f4ee90 401 } else {
ef456f85
JK		 402 pr_info("%s[0x%03X] %016llX %016llX %016llX %016llX %016llX %p%s\n",
403 "R ", i,
404 (unsigned long long)le64_to_cpu(u1->a),
405 (unsigned long long)le64_to_cpu(u1->b),
406 (unsigned long long)le64_to_cpu(u1->c),
407 (unsigned long long)le64_to_cpu(u1->d),
408 (unsigned long long)buffer_info->dma,
409 buffer_info->skb, next_desc);
84f4ee90
TI		 410
411 if (netif_msg_pktdata(adapter))
f0c5dadf
ET		 412 e1000e_dump_ps_pages(adapter,
413 buffer_info);
84f4ee90 414 }
84f4ee90
TI		 415 }
416 break;
417 default:
418 case 0:
5f450212 419 /* Extended Receive Descriptor (Read) Format
84f4ee90 420 *
5f450212
BA		 421 * +-----------------------------------------------------+
422 * 0 | Buffer Address [63:0] |
423 * +-----------------------------------------------------+
424 * 8 | Reserved |
425 * +-----------------------------------------------------+
84f4ee90 426 */
ef456f85 427 pr_info("R [desc] [buf addr 63:0 ] [reserved 63:0 ] [bi->dma ] [bi->skb] <-- Ext (Read) format\n");
5f450212
BA		 428 /* Extended Receive Descriptor (Write-Back) Format
429 *
430 * 63 48 47 32 31 24 23 4 3 0
431 * +------------------------------------------------------+
432 * | RSS Hash | | | |
433 * 0 +-------------------+ Rsvd | Reserved | MRQ RSS |
434 * | Packet | IP | | | Type |
435 * | Checksum | Ident | | | |
436 * +------------------------------------------------------+
437 * 8 | VLAN Tag | Length | Extended Error | Extended Status |
438 * +------------------------------------------------------+
439 * 63 48 47 32 31 20 19 0
440 */
ef456f85 441 pr_info("RWB[desc] [cs ipid mrq] [vt ln xe xs] [bi->skb] <-- Ext (Write-Back) format\n");
5f450212
BA		 442
443 for (i = 0; i < rx_ring->count; i++) {
ef456f85
JK		 444 const char *next_desc;
445
84f4ee90 446 buffer_info = &rx_ring->buffer_info[i];
5f450212
BA		 447 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
448 u1 = (struct my_u1 *)rx_desc;
449 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
ef456f85
JK		 450
451 if (i == rx_ring->next_to_use)
452 next_desc = " NTU";
453 else if (i == rx_ring->next_to_clean)
454 next_desc = " NTC";
455 else
456 next_desc = "";
457
5f450212
BA		 458 if (staterr & E1000_RXD_STAT_DD) {
459 /* Descriptor Done */
ef456f85
JK		 460 pr_info("%s[0x%03X] %016llX %016llX ---------------- %p%s\n",
461 "RWB", i,
462 (unsigned long long)le64_to_cpu(u1->a),
463 (unsigned long long)le64_to_cpu(u1->b),
464 buffer_info->skb, next_desc);
5f450212 465 } else {
ef456f85
JK		 466 pr_info("%s[0x%03X] %016llX %016llX %016llX %p%s\n",
467 "R ", i,
468 (unsigned long long)le64_to_cpu(u1->a),
469 (unsigned long long)le64_to_cpu(u1->b),
470 (unsigned long long)buffer_info->dma,
471 buffer_info->skb, next_desc);
5f450212 472
f0c5dadf
ET		 473 if (netif_msg_pktdata(adapter) &&
474 buffer_info->skb)
5f450212
BA		 475 print_hex_dump(KERN_INFO, "",
476 DUMP_PREFIX_ADDRESS, 16,
477 1,
f0c5dadf 478 buffer_info->skb->data,
5f450212
BA		 479 adapter->rx_buffer_len,
480 true);
481 }
84f4ee90
TI		 482 }
483 }
84f4ee90
TI		 484}
485
bc7f75fa
AK		 486/**
487 * e1000_desc_unused - calculate if we have unused descriptors
488 **/
489static int e1000_desc_unused(struct e1000_ring *ring)
490{
491 if (ring->next_to_clean > ring->next_to_use)
492 return ring->next_to_clean - ring->next_to_use - 1;
493
494 return ring->count + ring->next_to_clean - ring->next_to_use - 1;
495}
496
b67e1913
BA		 497/**
498 * e1000e_systim_to_hwtstamp - convert system time value to hw time stamp
499 * @adapter: board private structure
500 * @hwtstamps: time stamp structure to update
501 * @systim: unsigned 64bit system time value.
502 *
503 * Convert the system time value stored in the RX/TXSTMP registers into a
504 * hwtstamp which can be used by the upper level time stamping functions.
505 *
506 * The 'systim_lock' spinlock is used to protect the consistency of the
507 * system time value. This is needed because reading the 64 bit time
508 * value involves reading two 32 bit registers. The first read latches the
509 * value.
510 **/
511static void e1000e_systim_to_hwtstamp(struct e1000_adapter *adapter,
512 struct skb_shared_hwtstamps *hwtstamps,
513 u64 systim)
514{
515 u64 ns;
516 unsigned long flags;
517
518 spin_lock_irqsave(&adapter->systim_lock, flags);
519 ns = timecounter_cyc2time(&adapter->tc, systim);
520 spin_unlock_irqrestore(&adapter->systim_lock, flags);
521
522 memset(hwtstamps, 0, sizeof(*hwtstamps));
523 hwtstamps->hwtstamp = ns_to_ktime(ns);
524}
525
526/**
527 * e1000e_rx_hwtstamp - utility function which checks for Rx time stamp
528 * @adapter: board private structure
529 * @status: descriptor extended error and status field
530 * @skb: particular skb to include time stamp
531 *
532 * If the time stamp is valid, convert it into the timecounter ns value
533 * and store that result into the shhwtstamps structure which is passed
534 * up the network stack.
535 **/
536static void e1000e_rx_hwtstamp(struct e1000_adapter *adapter, u32 status,
537 struct sk_buff *skb)
538{
539 struct e1000_hw *hw = &adapter->hw;
540 u64 rxstmp;
541
542 if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP) ||
543 !(status & E1000_RXDEXT_STATERR_TST) ||
544 !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID))
545 return;
546
547 /* The Rx time stamp registers contain the time stamp. No other
548 * received packet will be time stamped until the Rx time stamp
549 * registers are read. Because only one packet can be time stamped
550 * at a time, the register values must belong to this packet and
551 * therefore none of the other additional attributes need to be
552 * compared.
553 */
554 rxstmp = (u64)er32(RXSTMPL);
555 rxstmp |= (u64)er32(RXSTMPH) << 32;
556 e1000e_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), rxstmp);
557
558 adapter->flags2 &= ~FLAG2_CHECK_RX_HWTSTAMP;
559}
560
bc7f75fa 561/**
ad68076e 562 * e1000_receive_skb - helper function to handle Rx indications
bc7f75fa 563 * @adapter: board private structure
b67e1913 564 * @staterr: descriptor extended error and status field as written by hardware
bc7f75fa
AK		 565 * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
566 * @skb: pointer to sk_buff to be indicated to stack
567 **/
568static void e1000_receive_skb(struct e1000_adapter *adapter,
af667a29 569 struct net_device *netdev, struct sk_buff *skb,
b67e1913 570 u32 staterr, __le16 vlan)
bc7f75fa 571{
86d70e53 572 u16 tag = le16_to_cpu(vlan);
b67e1913
BA		 573
574 e1000e_rx_hwtstamp(adapter, staterr, skb);
575
bc7f75fa
AK		 576 skb->protocol = eth_type_trans(skb, netdev);
577
b67e1913 578 if (staterr & E1000_RXD_STAT_VP)
86a9bad3 579 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
86d70e53
JK		 580
581 napi_gro_receive(&adapter->napi, skb);
bc7f75fa
AK		 582}
583
584/**
af667a29 585 * e1000_rx_checksum - Receive Checksum Offload
afd12939
BA		 586 * @adapter: board private structure
587 * @status_err: receive descriptor status and error fields
588 * @csum: receive descriptor csum field
589 * @sk_buff: socket buffer with received data
bc7f75fa
AK		 590 **/
591static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
2e1706f2 592 struct sk_buff *skb)
bc7f75fa
AK		 593{
594 u16 status = (u16)status_err;
595 u8 errors = (u8)(status_err >> 24);
bc8acf2c
ED		 596
597 skb_checksum_none_assert(skb);
bc7f75fa 598
afd12939
BA		 599 /* Rx checksum disabled */
600 if (!(adapter->netdev->features & NETIF_F_RXCSUM))
601 return;
602
bc7f75fa
AK		 603 /* Ignore Checksum bit is set */
604 if (status & E1000_RXD_STAT_IXSM)
605 return;
afd12939 606
2e1706f2
BA		 607 /* TCP/UDP checksum error bit or IP checksum error bit is set */
608 if (errors & (E1000_RXD_ERR_TCPE | E1000_RXD_ERR_IPE)) {
bc7f75fa
AK		 609 /* let the stack verify checksum errors */
610 adapter->hw_csum_err++;
611 return;
612 }
613
614 /* TCP/UDP Checksum has not been calculated */
615 if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
616 return;
617
618 /* It must be a TCP or UDP packet with a valid checksum */
2e1706f2 619 skb->ip_summed = CHECKSUM_UNNECESSARY;
bc7f75fa
AK		 620 adapter->hw_csum_good++;
621}
622
55aa6985 623static void e1000e_update_rdt_wa(struct e1000_ring *rx_ring, unsigned int i)
c6e7f51e 624{
55aa6985 625 struct e1000_adapter *adapter = rx_ring->adapter;
c6e7f51e 626 struct e1000_hw *hw = &adapter->hw;
bdc125f7
BA		 627 s32 ret_val = __ew32_prepare(hw);
628
629 writel(i, rx_ring->tail);
c6e7f51e 630
bdc125f7 631 if (unlikely(!ret_val && (i != readl(rx_ring->tail)))) {
c6e7f51e 632 u32 rctl = er32(RCTL);
6cf08d1c 633
c6e7f51e
BA		 634 ew32(RCTL, rctl & ~E1000_RCTL_EN);
635 e_err("ME firmware caused invalid RDT - resetting\n");
636 schedule_work(&adapter->reset_task);
637 }
638}
639
55aa6985 640static void e1000e_update_tdt_wa(struct e1000_ring *tx_ring, unsigned int i)
c6e7f51e 641{
55aa6985 642 struct e1000_adapter *adapter = tx_ring->adapter;
c6e7f51e 643 struct e1000_hw *hw = &adapter->hw;
bdc125f7 644 s32 ret_val = __ew32_prepare(hw);
c6e7f51e 645
bdc125f7
BA		 646 writel(i, tx_ring->tail);
647
648 if (unlikely(!ret_val && (i != readl(tx_ring->tail)))) {
c6e7f51e 649 u32 tctl = er32(TCTL);
6cf08d1c 650
c6e7f51e
BA		 651 ew32(TCTL, tctl & ~E1000_TCTL_EN);
652 e_err("ME firmware caused invalid TDT - resetting\n");
653 schedule_work(&adapter->reset_task);
654 }
655}
656
bc7f75fa 657/**
5f450212 658 * e1000_alloc_rx_buffers - Replace used receive buffers
55aa6985 659 * @rx_ring: Rx descriptor ring
bc7f75fa 660 **/
55aa6985 661static void e1000_alloc_rx_buffers(struct e1000_ring *rx_ring,
c2fed996 662 int cleaned_count, gfp_t gfp)
bc7f75fa 663{
55aa6985 664 struct e1000_adapter *adapter = rx_ring->adapter;
bc7f75fa
AK		 665 struct net_device *netdev = adapter->netdev;
666 struct pci_dev *pdev = adapter->pdev;
5f450212 667 union e1000_rx_desc_extended *rx_desc;
bc7f75fa
AK		 668 struct e1000_buffer *buffer_info;
669 struct sk_buff *skb;
670 unsigned int i;
89d71a66 671 unsigned int bufsz = adapter->rx_buffer_len;
bc7f75fa
AK		 672
673 i = rx_ring->next_to_use;
674 buffer_info = &rx_ring->buffer_info[i];
675
676 while (cleaned_count--) {
677 skb = buffer_info->skb;
678 if (skb) {
679 skb_trim(skb, 0);
680 goto map_skb;
681 }
682
c2fed996 683 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp);
bc7f75fa
AK		 684 if (!skb) {
685 /* Better luck next round */
686 adapter->alloc_rx_buff_failed++;
687 break;
688 }
689
bc7f75fa
AK		 690 buffer_info->skb = skb;
691map_skb:
0be3f55f 692 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
bc7f75fa 693 adapter->rx_buffer_len,
0be3f55f
NN		 694 DMA_FROM_DEVICE);
695 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
af667a29 696 dev_err(&pdev->dev, "Rx DMA map failed\n");
bc7f75fa
AK		 697 adapter->rx_dma_failed++;
698 break;
699 }
700
5f450212
BA		 701 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
702 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
bc7f75fa 703
50849d79 704 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
e921eb1a 705 /* Force memory writes to complete before letting h/w
50849d79
TH		 706 * know there are new descriptors to fetch. (Only
707 * applicable for weak-ordered memory model archs,
708 * such as IA-64).
709 */
710 wmb();
c6e7f51e 711 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
55aa6985 712 e1000e_update_rdt_wa(rx_ring, i);
c6e7f51e 713 else
c5083cf6 714 writel(i, rx_ring->tail);
50849d79 715 }
bc7f75fa
AK		 716 i++;
717 if (i == rx_ring->count)
718 i = 0;
719 buffer_info = &rx_ring->buffer_info[i];
720 }
721
50849d79 722 rx_ring->next_to_use = i;
bc7f75fa
AK		 723}
724
725/**
726 * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
55aa6985 727 * @rx_ring: Rx descriptor ring
bc7f75fa 728 **/
55aa6985 729static void e1000_alloc_rx_buffers_ps(struct e1000_ring *rx_ring,
c2fed996 730 int cleaned_count, gfp_t gfp)
bc7f75fa 731{
55aa6985 732 struct e1000_adapter *adapter = rx_ring->adapter;
bc7f75fa
AK		 733 struct net_device *netdev = adapter->netdev;
734 struct pci_dev *pdev = adapter->pdev;
735 union e1000_rx_desc_packet_split *rx_desc;
bc7f75fa
AK		 736 struct e1000_buffer *buffer_info;
737 struct e1000_ps_page *ps_page;
738 struct sk_buff *skb;
739 unsigned int i, j;
740
741 i = rx_ring->next_to_use;
742 buffer_info = &rx_ring->buffer_info[i];
743
744 while (cleaned_count--) {
745 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
746
747 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
47f44e40
AK		 748 ps_page = &buffer_info->ps_pages[j];
749 if (j >= adapter->rx_ps_pages) {
750 /* all unused desc entries get hw null ptr */
af667a29
BA		 751 rx_desc->read.buffer_addr[j + 1] =
752 ~cpu_to_le64(0);
47f44e40
AK		 753 continue;
754 }
755 if (!ps_page->page) {
c2fed996 756 ps_page->page = alloc_page(gfp);
bc7f75fa 757 if (!ps_page->page) {
47f44e40
AK		 758 adapter->alloc_rx_buff_failed++;
759 goto no_buffers;
760 }
0be3f55f
NN		 761 ps_page->dma = dma_map_page(&pdev->dev,
762 ps_page->page,
763 0, PAGE_SIZE,
764 DMA_FROM_DEVICE);
765 if (dma_mapping_error(&pdev->dev,
766 ps_page->dma)) {
47f44e40 767 dev_err(&adapter->pdev->dev,
af667a29 768 "Rx DMA page map failed\n");
47f44e40
AK		 769 adapter->rx_dma_failed++;
770 goto no_buffers;
bc7f75fa 771 }
bc7f75fa 772 }
e921eb1a 773 /* Refresh the desc even if buffer_addrs
47f44e40
AK		 774 * didn't change because each write-back
775 * erases this info.
776 */
af667a29
BA		 777 rx_desc->read.buffer_addr[j + 1] =
778 cpu_to_le64(ps_page->dma);
bc7f75fa
AK		 779 }
780
e5fe2541 781 skb = __netdev_alloc_skb_ip_align(netdev, adapter->rx_ps_bsize0,
c2fed996 782 gfp);
bc7f75fa
AK		 783
784 if (!skb) {
785 adapter->alloc_rx_buff_failed++;
786 break;
787 }
788
bc7f75fa 789 buffer_info->skb = skb;
0be3f55f 790 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
bc7f75fa 791 adapter->rx_ps_bsize0,
0be3f55f
NN		 792 DMA_FROM_DEVICE);
793 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
af667a29 794 dev_err(&pdev->dev, "Rx DMA map failed\n");
bc7f75fa
AK		 795 adapter->rx_dma_failed++;
796 /* cleanup skb */
797 dev_kfree_skb_any(skb);
798 buffer_info->skb = NULL;
799 break;
800 }
801
802 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
803
50849d79 804 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
e921eb1a 805 /* Force memory writes to complete before letting h/w
50849d79
TH		 806 * know there are new descriptors to fetch. (Only
807 * applicable for weak-ordered memory model archs,
808 * such as IA-64).
809 */
810 wmb();
c6e7f51e 811 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
55aa6985 812 e1000e_update_rdt_wa(rx_ring, i << 1);
c6e7f51e 813 else
c5083cf6 814 writel(i << 1, rx_ring->tail);
50849d79
TH		 815 }
816
bc7f75fa
AK		 817 i++;
818 if (i == rx_ring->count)
819 i = 0;
820 buffer_info = &rx_ring->buffer_info[i];
821 }
822
823no_buffers:
50849d79 824 rx_ring->next_to_use = i;
bc7f75fa
AK		 825}
826
97ac8cae
BA		 827/**
828 * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
55aa6985 829 * @rx_ring: Rx descriptor ring
97ac8cae
BA		 830 * @cleaned_count: number of buffers to allocate this pass
831 **/
832
55aa6985 833static void e1000_alloc_jumbo_rx_buffers(struct e1000_ring *rx_ring,
c2fed996 834 int cleaned_count, gfp_t gfp)
97ac8cae 835{
55aa6985 836 struct e1000_adapter *adapter = rx_ring->adapter;
97ac8cae
BA		 837 struct net_device *netdev = adapter->netdev;
838 struct pci_dev *pdev = adapter->pdev;
5f450212 839 union e1000_rx_desc_extended *rx_desc;
97ac8cae
BA		 840 struct e1000_buffer *buffer_info;
841 struct sk_buff *skb;
842 unsigned int i;
2a2293b9 843 unsigned int bufsz = 256 - 16; /* for skb_reserve */
97ac8cae
BA		 844
845 i = rx_ring->next_to_use;
846 buffer_info = &rx_ring->buffer_info[i];
847
848 while (cleaned_count--) {
849 skb = buffer_info->skb;
850 if (skb) {
851 skb_trim(skb, 0);
852 goto check_page;
853 }
854
c2fed996 855 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp);
97ac8cae
BA		 856 if (unlikely(!skb)) {
857 /* Better luck next round */
858 adapter->alloc_rx_buff_failed++;
859 break;
860 }
861
97ac8cae
BA		 862 buffer_info->skb = skb;
863check_page:
864 /* allocate a new page if necessary */
865 if (!buffer_info->page) {
c2fed996 866 buffer_info->page = alloc_page(gfp);
97ac8cae
BA		 867 if (unlikely(!buffer_info->page)) {
868 adapter->alloc_rx_buff_failed++;
869 break;
870 }
871 }
872
37287fae 873 if (!buffer_info->dma) {
0be3f55f 874 buffer_info->dma = dma_map_page(&pdev->dev,
f0ff4398
BA		 875 buffer_info->page, 0,
876 PAGE_SIZE,
0be3f55f 877 DMA_FROM_DEVICE);
37287fae
CP		 878 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
879 adapter->alloc_rx_buff_failed++;
880 break;
881 }
882 }
97ac8cae 883
5f450212
BA		 884 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
885 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
97ac8cae
BA		 886
887 if (unlikely(++i == rx_ring->count))
888 i = 0;
889 buffer_info = &rx_ring->buffer_info[i];
890 }
891
892 if (likely(rx_ring->next_to_use != i)) {
893 rx_ring->next_to_use = i;
894 if (unlikely(i-- == 0))
895 i = (rx_ring->count - 1);
896
897 /* Force memory writes to complete before letting h/w
898 * know there are new descriptors to fetch. (Only
899 * applicable for weak-ordered memory model archs,
e921eb1a
BA		 900 * such as IA-64).
901 */
97ac8cae 902 wmb();
c6e7f51e 903 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
55aa6985 904 e1000e_update_rdt_wa(rx_ring, i);
c6e7f51e 905 else
c5083cf6 906 writel(i, rx_ring->tail);
97ac8cae
BA		 907 }
908}
909
70495a50
BA		 910static inline void e1000_rx_hash(struct net_device *netdev, __le32 rss,
911 struct sk_buff *skb)
912{
913 if (netdev->features & NETIF_F_RXHASH)
e25909bc 914 skb_set_hash(skb, le32_to_cpu(rss), PKT_HASH_TYPE_L3);
70495a50
BA		 915}
916
bc7f75fa 917/**
55aa6985
BA		 918 * e1000_clean_rx_irq - Send received data up the network stack
919 * @rx_ring: Rx descriptor ring
bc7f75fa
AK		 920 *
921 * the return value indicates whether actual cleaning was done, there
922 * is no guarantee that everything was cleaned
923 **/
55aa6985
BA		 924static bool e1000_clean_rx_irq(struct e1000_ring *rx_ring, int *work_done,
925 int work_to_do)
bc7f75fa 926{
55aa6985 927 struct e1000_adapter *adapter = rx_ring->adapter;
bc7f75fa
AK		 928 struct net_device *netdev = adapter->netdev;
929 struct pci_dev *pdev = adapter->pdev;
3bb99fe2 930 struct e1000_hw *hw = &adapter->hw;
5f450212 931 union e1000_rx_desc_extended *rx_desc, *next_rxd;
bc7f75fa 932 struct e1000_buffer *buffer_info, *next_buffer;
5f450212 933 u32 length, staterr;
bc7f75fa
AK		 934 unsigned int i;
935 int cleaned_count = 0;
3db1cd5c 936 bool cleaned = false;
bc7f75fa
AK		 937 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
938
939 i = rx_ring->next_to_clean;
5f450212
BA		 940 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
941 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
bc7f75fa
AK		 942 buffer_info = &rx_ring->buffer_info[i];
943
5f450212 944 while (staterr & E1000_RXD_STAT_DD) {
bc7f75fa 945 struct sk_buff *skb;
bc7f75fa
AK		 946
947 if (*work_done >= work_to_do)
948 break;
949 (*work_done)++;
837a1dba 950 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */
bc7f75fa 951
bc7f75fa
AK		 952 skb = buffer_info->skb;
953 buffer_info->skb = NULL;
954
955 prefetch(skb->data - NET_IP_ALIGN);
956
957 i++;
958 if (i == rx_ring->count)
959 i = 0;
5f450212 960 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i);
bc7f75fa
AK		 961 prefetch(next_rxd);
962
963 next_buffer = &rx_ring->buffer_info[i];
964
3db1cd5c 965 cleaned = true;
bc7f75fa 966 cleaned_count++;
e5fe2541
BA		 967 dma_unmap_single(&pdev->dev, buffer_info->dma,
968 adapter->rx_buffer_len, DMA_FROM_DEVICE);
bc7f75fa
AK		 969 buffer_info->dma = 0;
970
5f450212 971 length = le16_to_cpu(rx_desc->wb.upper.length);
bc7f75fa 972
e921eb1a 973 /* !EOP means multiple descriptors were used to store a single
b94b5028
JB		 974 * packet, if that's the case we need to toss it. In fact, we
975 * need to toss every packet with the EOP bit clear and the
976 * next frame that _does_ have the EOP bit set, as it is by
977 * definition only a frame fragment
978 */
5f450212 979 if (unlikely(!(staterr & E1000_RXD_STAT_EOP)))
b94b5028
JB		 980 adapter->flags2 |= FLAG2_IS_DISCARDING;
981
982 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
bc7f75fa 983 /* All receives must fit into a single buffer */
3bb99fe2 984 e_dbg("Receive packet consumed multiple buffers\n");
bc7f75fa
AK		 985 /* recycle */
986 buffer_info->skb = skb;
5f450212 987 if (staterr & E1000_RXD_STAT_EOP)
b94b5028 988 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
bc7f75fa
AK		 989 goto next_desc;
990 }
991
cf955e6c
BG		 992 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
993 !(netdev->features & NETIF_F_RXALL))) {
bc7f75fa
AK		 994 /* recycle */
995 buffer_info->skb = skb;
996 goto next_desc;
997 }
998
eb7c3adb 999 /* adjust length to remove Ethernet CRC */
0184039a
BG		 1000 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
1001 /* If configured to store CRC, don't subtract FCS,
1002 * but keep the FCS bytes out of the total_rx_bytes
1003 * counter
1004 */
1005 if (netdev->features & NETIF_F_RXFCS)
1006 total_rx_bytes -= 4;
1007 else
1008 length -= 4;
1009 }
eb7c3adb 1010
bc7f75fa
AK		 1011 total_rx_bytes += length;
1012 total_rx_packets++;
1013
e921eb1a 1014 /* code added for copybreak, this should improve
bc7f75fa 1015 * performance for small packets with large amounts
ad68076e
BA		 1016 * of reassembly being done in the stack
1017 */
bc7f75fa
AK		 1018 if (length < copybreak) {
1019 struct sk_buff *new_skb =
67fd893e 1020 napi_alloc_skb(&adapter->napi, length);
bc7f75fa 1021 if (new_skb) {
808ff676
BA		 1022 skb_copy_to_linear_data_offset(new_skb,
1023 -NET_IP_ALIGN,
1024 (skb->data -
1025 NET_IP_ALIGN),
1026 (length +
1027 NET_IP_ALIGN));
bc7f75fa
AK		 1028 /* save the skb in buffer_info as good */
1029 buffer_info->skb = skb;
1030 skb = new_skb;
1031 }
1032 /* else just continue with the old one */
1033 }
1034 /* end copybreak code */
1035 skb_put(skb, length);
1036
1037 /* Receive Checksum Offload */
2e1706f2 1038 e1000_rx_checksum(adapter, staterr, skb);
bc7f75fa 1039
70495a50
BA		 1040 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1041
5f450212
BA		 1042 e1000_receive_skb(adapter, netdev, skb, staterr,
1043 rx_desc->wb.upper.vlan);
bc7f75fa
AK		 1044
1045next_desc:
5f450212 1046 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF);
bc7f75fa
AK		 1047
1048 /* return some buffers to hardware, one at a time is too slow */
1049 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
55aa6985 1050 adapter->alloc_rx_buf(rx_ring, cleaned_count,
c2fed996 1051 GFP_ATOMIC);
bc7f75fa
AK		 1052 cleaned_count = 0;
1053 }
1054
1055 /* use prefetched values */
1056 rx_desc = next_rxd;
1057 buffer_info = next_buffer;
5f450212
BA		 1058
1059 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
bc7f75fa
AK		 1060 }
1061 rx_ring->next_to_clean = i;
1062
1063 cleaned_count = e1000_desc_unused(rx_ring);
1064 if (cleaned_count)
55aa6985 1065 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
bc7f75fa 1066
bc7f75fa 1067 adapter->total_rx_bytes += total_rx_bytes;
7c25769f 1068 adapter->total_rx_packets += total_rx_packets;
bc7f75fa
AK		 1069 return cleaned;
1070}
1071
55aa6985
BA		 1072static void e1000_put_txbuf(struct e1000_ring *tx_ring,
1073 struct e1000_buffer *buffer_info)
bc7f75fa 1074{
55aa6985
BA		 1075 struct e1000_adapter *adapter = tx_ring->adapter;
1076
03b1320d
AD		 1077 if (buffer_info->dma) {
1078 if (buffer_info->mapped_as_page)
0be3f55f
NN		 1079 dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1080 buffer_info->length, DMA_TO_DEVICE);
03b1320d 1081 else
0be3f55f
NN		 1082 dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1083 buffer_info->length, DMA_TO_DEVICE);
03b1320d
AD		 1084 buffer_info->dma = 0;
1085 }
bc7f75fa
AK		 1086 if (buffer_info->skb) {
1087 dev_kfree_skb_any(buffer_info->skb);
1088 buffer_info->skb = NULL;
1089 }
1b7719c4 1090 buffer_info->time_stamp = 0;
bc7f75fa
AK		 1091}
1092
41cec6f1 1093static void e1000_print_hw_hang(struct work_struct *work)
bc7f75fa 1094{
41cec6f1 1095 struct e1000_adapter *adapter = container_of(work,
f0ff4398
BA		 1096 struct e1000_adapter,
1097 print_hang_task);
09357b00 1098 struct net_device *netdev = adapter->netdev;
bc7f75fa
AK		 1099 struct e1000_ring *tx_ring = adapter->tx_ring;
1100 unsigned int i = tx_ring->next_to_clean;
1101 unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
1102 struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop);
41cec6f1
BA		 1103 struct e1000_hw *hw = &adapter->hw;
1104 u16 phy_status, phy_1000t_status, phy_ext_status;
1105 u16 pci_status;
1106
615b32af
JB		 1107 if (test_bit(__E1000_DOWN, &adapter->state))
1108 return;
1109
e5fe2541 1110 if (!adapter->tx_hang_recheck && (adapter->flags2 & FLAG2_DMA_BURST)) {
e921eb1a 1111 /* May be block on write-back, flush and detect again
09357b00
JK		 1112 * flush pending descriptor writebacks to memory
1113 */
1114 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
1115 /* execute the writes immediately */
1116 e1e_flush();
e921eb1a 1117 /* Due to rare timing issues, write to TIDV again to ensure
bf03085f
MV		 1118 * the write is successful
1119 */
1120 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
1121 /* execute the writes immediately */
1122 e1e_flush();
09357b00
JK		 1123 adapter->tx_hang_recheck = true;
1124 return;
1125 }
09357b00 1126 adapter->tx_hang_recheck = false;
d9554e96
DE		 1127
1128 if (er32(TDH(0)) == er32(TDT(0))) {
1129 e_dbg("false hang detected, ignoring\n");
1130 return;
1131 }
1132
1133 /* Real hang detected */
09357b00
JK		 1134 netif_stop_queue(netdev);
1135
c2ade1a4
BA		 1136 e1e_rphy(hw, MII_BMSR, &phy_status);
1137 e1e_rphy(hw, MII_STAT1000, &phy_1000t_status);
1138 e1e_rphy(hw, MII_ESTATUS, &phy_ext_status);
bc7f75fa 1139
41cec6f1
BA		 1140 pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status);
1141
1142 /* detected Hardware unit hang */
1143 e_err("Detected Hardware Unit Hang:\n"
44defeb3
JK		 1144 " TDH <%x>\n"
1145 " TDT <%x>\n"
1146 " next_to_use <%x>\n"
1147 " next_to_clean <%x>\n"
1148 "buffer_info[next_to_clean]:\n"
1149 " time_stamp <%lx>\n"
1150 " next_to_watch <%x>\n"
1151 " jiffies <%lx>\n"
41cec6f1
BA		 1152 " next_to_watch.status <%x>\n"
1153 "MAC Status <%x>\n"
1154 "PHY Status <%x>\n"
1155 "PHY 1000BASE-T Status <%x>\n"
1156 "PHY Extended Status <%x>\n"
1157 "PCI Status <%x>\n",
e5fe2541
BA		 1158 readl(tx_ring->head), readl(tx_ring->tail), tx_ring->next_to_use,
1159 tx_ring->next_to_clean, tx_ring->buffer_info[eop].time_stamp,
1160 eop, jiffies, eop_desc->upper.fields.status, er32(STATUS),
1161 phy_status, phy_1000t_status, phy_ext_status, pci_status);
7c0427ee 1162
d9554e96
DE		 1163 e1000e_dump(adapter);
1164
7c0427ee
BA		 1165 /* Suggest workaround for known h/w issue */
1166 if ((hw->mac.type == e1000_pchlan) && (er32(CTRL) & E1000_CTRL_TFCE))
1167 e_err("Try turning off Tx pause (flow control) via ethtool\n");
bc7f75fa
AK		 1168}
1169
b67e1913
BA		 1170/**
1171 * e1000e_tx_hwtstamp_work - check for Tx time stamp
1172 * @work: pointer to work struct
1173 *
1174 * This work function polls the TSYNCTXCTL valid bit to determine when a
1175 * timestamp has been taken for the current stored skb. The timestamp must
1176 * be for this skb because only one such packet is allowed in the queue.
1177 */
1178static void e1000e_tx_hwtstamp_work(struct work_struct *work)
1179{
1180 struct e1000_adapter *adapter = container_of(work, struct e1000_adapter,
1181 tx_hwtstamp_work);
1182 struct e1000_hw *hw = &adapter->hw;
1183
b67e1913
BA		 1184 if (er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_VALID) {
1185 struct skb_shared_hwtstamps shhwtstamps;
1186 u64 txstmp;
1187
1188 txstmp = er32(TXSTMPL);
1189 txstmp |= (u64)er32(TXSTMPH) << 32;
1190
1191 e1000e_systim_to_hwtstamp(adapter, &shhwtstamps, txstmp);
1192
1193 skb_tstamp_tx(adapter->tx_hwtstamp_skb, &shhwtstamps);
1194 dev_kfree_skb_any(adapter->tx_hwtstamp_skb);
1195 adapter->tx_hwtstamp_skb = NULL;
59c871c5
JK		 1196 } else if (time_after(jiffies, adapter->tx_hwtstamp_start
1197 + adapter->tx_timeout_factor * HZ)) {
1198 dev_kfree_skb_any(adapter->tx_hwtstamp_skb);
1199 adapter->tx_hwtstamp_skb = NULL;
1200 adapter->tx_hwtstamp_timeouts++;
c5ffe7e1 1201 e_warn("clearing Tx timestamp hang\n");
b67e1913
BA		 1202 } else {
1203 /* reschedule to check later */
1204 schedule_work(&adapter->tx_hwtstamp_work);
1205 }
1206}
1207
bc7f75fa
AK		 1208/**
1209 * e1000_clean_tx_irq - Reclaim resources after transmit completes
55aa6985 1210 * @tx_ring: Tx descriptor ring
bc7f75fa
AK		 1211 *
1212 * the return value indicates whether actual cleaning was done, there
1213 * is no guarantee that everything was cleaned
1214 **/
55aa6985 1215static bool e1000_clean_tx_irq(struct e1000_ring *tx_ring)
bc7f75fa 1216{
55aa6985 1217 struct e1000_adapter *adapter = tx_ring->adapter;
bc7f75fa
AK		 1218 struct net_device *netdev = adapter->netdev;
1219 struct e1000_hw *hw = &adapter->hw;
bc7f75fa
AK		 1220 struct e1000_tx_desc *tx_desc, *eop_desc;
1221 struct e1000_buffer *buffer_info;
1222 unsigned int i, eop;
1223 unsigned int count = 0;
bc7f75fa 1224 unsigned int total_tx_bytes = 0, total_tx_packets = 0;
3f0cfa3b 1225 unsigned int bytes_compl = 0, pkts_compl = 0;
bc7f75fa
AK		 1226
1227 i = tx_ring->next_to_clean;
1228 eop = tx_ring->buffer_info[i].next_to_watch;
1229 eop_desc = E1000_TX_DESC(*tx_ring, eop);
1230
12d04a3c
AD		 1231 while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
1232 (count < tx_ring->count)) {
a86043c2 1233 bool cleaned = false;
6cf08d1c 1234
837a1dba 1235 dma_rmb(); /* read buffer_info after eop_desc */
a86043c2 1236 for (; !cleaned; count++) {
bc7f75fa
AK		 1237 tx_desc = E1000_TX_DESC(*tx_ring, i);
1238 buffer_info = &tx_ring->buffer_info[i];
1239 cleaned = (i == eop);
1240
1241 if (cleaned) {
9ed318d5
TH		 1242 total_tx_packets += buffer_info->segs;
1243 total_tx_bytes += buffer_info->bytecount;
3f0cfa3b
TH		 1244 if (buffer_info->skb) {
1245 bytes_compl += buffer_info->skb->len;
1246 pkts_compl++;
1247 }
bc7f75fa
AK		 1248 }
1249
55aa6985 1250 e1000_put_txbuf(tx_ring, buffer_info);
bc7f75fa
AK		 1251 tx_desc->upper.data = 0;
1252
1253 i++;
1254 if (i == tx_ring->count)
1255 i = 0;
1256 }
1257
dac87619
TL		 1258 if (i == tx_ring->next_to_use)
1259 break;
bc7f75fa
AK		 1260 eop = tx_ring->buffer_info[i].next_to_watch;
1261 eop_desc = E1000_TX_DESC(*tx_ring, eop);
bc7f75fa
AK		 1262 }
1263
1264 tx_ring->next_to_clean = i;
1265
3f0cfa3b
TH		 1266 netdev_completed_queue(netdev, pkts_compl, bytes_compl);
1267
bc7f75fa 1268#define TX_WAKE_THRESHOLD 32
a86043c2
JB		 1269 if (count && netif_carrier_ok(netdev) &&
1270 e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) {
bc7f75fa
AK		 1271 /* Make sure that anybody stopping the queue after this
1272 * sees the new next_to_clean.
1273 */
1274 smp_mb();
1275
1276 if (netif_queue_stopped(netdev) &&
1277 !(test_bit(__E1000_DOWN, &adapter->state))) {
1278 netif_wake_queue(netdev);
1279 ++adapter->restart_queue;
1280 }
1281 }
1282
1283 if (adapter->detect_tx_hung) {
e921eb1a 1284 /* Detect a transmit hang in hardware, this serializes the
41cec6f1
BA		 1285 * check with the clearing of time_stamp and movement of i
1286 */
3db1cd5c 1287 adapter->detect_tx_hung = false;
12d04a3c
AD		 1288 if (tx_ring->buffer_info[i].time_stamp &&
1289 time_after(jiffies, tx_ring->buffer_info[i].time_stamp
8e95a202 1290 + (adapter->tx_timeout_factor * HZ)) &&
09357b00 1291 !(er32(STATUS) & E1000_STATUS_TXOFF))
41cec6f1 1292 schedule_work(&adapter->print_hang_task);
09357b00
JK		 1293 else
1294 adapter->tx_hang_recheck = false;
bc7f75fa
AK		 1295 }
1296 adapter->total_tx_bytes += total_tx_bytes;
1297 adapter->total_tx_packets += total_tx_packets;
807540ba 1298 return count < tx_ring->count;
bc7f75fa
AK		 1299}
1300
bc7f75fa
AK		 1301/**
1302 * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
55aa6985 1303 * @rx_ring: Rx descriptor ring
bc7f75fa
AK		 1304 *
1305 * the return value indicates whether actual cleaning was done, there
1306 * is no guarantee that everything was cleaned
1307 **/
55aa6985
BA		 1308static bool e1000_clean_rx_irq_ps(struct e1000_ring *rx_ring, int *work_done,
1309 int work_to_do)
bc7f75fa 1310{
55aa6985 1311 struct e1000_adapter *adapter = rx_ring->adapter;
3bb99fe2 1312 struct e1000_hw *hw = &adapter->hw;
bc7f75fa
AK		 1313 union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
1314 struct net_device *netdev = adapter->netdev;
1315 struct pci_dev *pdev = adapter->pdev;
bc7f75fa
AK		 1316 struct e1000_buffer *buffer_info, *next_buffer;
1317 struct e1000_ps_page *ps_page;
1318 struct sk_buff *skb;
1319 unsigned int i, j;
1320 u32 length, staterr;
1321 int cleaned_count = 0;
3db1cd5c 1322 bool cleaned = false;
bc7f75fa
AK		 1323 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1324
1325 i = rx_ring->next_to_clean;
1326 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
1327 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1328 buffer_info = &rx_ring->buffer_info[i];
1329
1330 while (staterr & E1000_RXD_STAT_DD) {
1331 if (*work_done >= work_to_do)
1332 break;
1333 (*work_done)++;
1334 skb = buffer_info->skb;
837a1dba 1335 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */
bc7f75fa
AK		 1336
1337 /* in the packet split case this is header only */
1338 prefetch(skb->data - NET_IP_ALIGN);
1339
1340 i++;
1341 if (i == rx_ring->count)
1342 i = 0;
1343 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
1344 prefetch(next_rxd);
1345
1346 next_buffer = &rx_ring->buffer_info[i];
1347
3db1cd5c 1348 cleaned = true;
bc7f75fa 1349 cleaned_count++;
0be3f55f 1350 dma_unmap_single(&pdev->dev, buffer_info->dma,
af667a29 1351 adapter->rx_ps_bsize0, DMA_FROM_DEVICE);
bc7f75fa
AK		 1352 buffer_info->dma = 0;
1353
af667a29 1354 /* see !EOP comment in other Rx routine */
b94b5028
JB		 1355 if (!(staterr & E1000_RXD_STAT_EOP))
1356 adapter->flags2 |= FLAG2_IS_DISCARDING;
1357
1358 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
ef456f85 1359 e_dbg("Packet Split buffers didn't pick up the full packet\n");
bc7f75fa 1360 dev_kfree_skb_irq(skb);
b94b5028
JB		 1361 if (staterr & E1000_RXD_STAT_EOP)
1362 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
bc7f75fa
AK		 1363 goto next_desc;
1364 }
1365
cf955e6c
BG		 1366 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
1367 !(netdev->features & NETIF_F_RXALL))) {
bc7f75fa
AK		 1368 dev_kfree_skb_irq(skb);
1369 goto next_desc;
1370 }
1371
1372 length = le16_to_cpu(rx_desc->wb.middle.length0);
1373
1374 if (!length) {
ef456f85 1375 e_dbg("Last part of the packet spanning multiple descriptors\n");
bc7f75fa
AK		 1376 dev_kfree_skb_irq(skb);
1377 goto next_desc;
1378 }
1379
1380 /* Good Receive */
1381 skb_put(skb, length);
1382
1383 {
e921eb1a 1384 /* this looks ugly, but it seems compiler issues make
0e15df49
BA		 1385 * it more efficient than reusing j
1386 */
1387 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
bc7f75fa 1388
e921eb1a 1389 /* page alloc/put takes too long and effects small
0e15df49
BA		 1390 * packet throughput, so unsplit small packets and
1391 * save the alloc/put only valid in softirq (napi)
1392 * context to call kmap_*
ad68076e 1393 */
0e15df49
BA		 1394 if (l1 && (l1 <= copybreak) &&
1395 ((length + l1) <= adapter->rx_ps_bsize0)) {
1396 u8 *vaddr;
1397
1398 ps_page = &buffer_info->ps_pages[0];
1399
e921eb1a 1400 /* there is no documentation about how to call
0e15df49
BA		 1401 * kmap_atomic, so we can't hold the mapping
1402 * very long
1403 */
1404 dma_sync_single_for_cpu(&pdev->dev,
1405 ps_page->dma,
1406 PAGE_SIZE,
1407 DMA_FROM_DEVICE);
9f393834 1408 vaddr = kmap_atomic(ps_page->page);
0e15df49 1409 memcpy(skb_tail_pointer(skb), vaddr, l1);
9f393834 1410 kunmap_atomic(vaddr);
0e15df49
BA		 1411 dma_sync_single_for_device(&pdev->dev,
1412 ps_page->dma,
1413 PAGE_SIZE,
1414 DMA_FROM_DEVICE);
1415
1416 /* remove the CRC */
0184039a
BG		 1417 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
1418 if (!(netdev->features & NETIF_F_RXFCS))
1419 l1 -= 4;
1420 }
0e15df49
BA		 1421
1422 skb_put(skb, l1);
1423 goto copydone;
e80bd1d1 1424 } /* if */
bc7f75fa
AK		 1425 }
1426
1427 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1428 length = le16_to_cpu(rx_desc->wb.upper.length[j]);
1429 if (!length)
1430 break;
1431
47f44e40 1432 ps_page = &buffer_info->ps_pages[j];
0be3f55f
NN		 1433 dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1434 DMA_FROM_DEVICE);
bc7f75fa
AK		 1435 ps_page->dma = 0;
1436 skb_fill_page_desc(skb, j, ps_page->page, 0, length);
1437 ps_page->page = NULL;
1438 skb->len += length;
1439 skb->data_len += length;
98a045d7 1440 skb->truesize += PAGE_SIZE;
bc7f75fa
AK		 1441 }
1442
eb7c3adb
JK		 1443 /* strip the ethernet crc, problem is we're using pages now so
1444 * this whole operation can get a little cpu intensive
1445 */
0184039a
BG		 1446 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
1447 if (!(netdev->features & NETIF_F_RXFCS))
1448 pskb_trim(skb, skb->len - 4);
1449 }
eb7c3adb 1450
bc7f75fa
AK		 1451copydone:
1452 total_rx_bytes += skb->len;
1453 total_rx_packets++;
1454
2e1706f2 1455 e1000_rx_checksum(adapter, staterr, skb);
bc7f75fa 1456
70495a50
BA		 1457 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1458
bc7f75fa 1459 if (rx_desc->wb.upper.header_status &
17e813ec 1460 cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP))
bc7f75fa
AK		 1461 adapter->rx_hdr_split++;
1462
b67e1913
BA		 1463 e1000_receive_skb(adapter, netdev, skb, staterr,
1464 rx_desc->wb.middle.vlan);
bc7f75fa
AK		 1465
1466next_desc:
1467 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
1468 buffer_info->skb = NULL;
1469
1470 /* return some buffers to hardware, one at a time is too slow */
1471 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
55aa6985 1472 adapter->alloc_rx_buf(rx_ring, cleaned_count,
c2fed996 1473 GFP_ATOMIC);
bc7f75fa
AK		 1474 cleaned_count = 0;
1475 }
1476
1477 /* use prefetched values */
1478 rx_desc = next_rxd;
1479 buffer_info = next_buffer;
1480
1481 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1482 }
1483 rx_ring->next_to_clean = i;
1484
1485 cleaned_count = e1000_desc_unused(rx_ring);
1486 if (cleaned_count)
55aa6985 1487 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
bc7f75fa 1488
bc7f75fa 1489 adapter->total_rx_bytes += total_rx_bytes;
7c25769f 1490 adapter->total_rx_packets += total_rx_packets;
bc7f75fa
AK		 1491 return cleaned;
1492}
1493
97ac8cae
BA		 1494/**
1495 * e1000_consume_page - helper function
1496 **/
1497static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
66501f56 1498 u16 length)
97ac8cae
BA		 1499{
1500 bi->page = NULL;
1501 skb->len += length;
1502 skb->data_len += length;
98a045d7 1503 skb->truesize += PAGE_SIZE;
97ac8cae
BA		 1504}
1505
1506/**
1507 * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
1508 * @adapter: board private structure
1509 *
1510 * the return value indicates whether actual cleaning was done, there
1511 * is no guarantee that everything was cleaned
1512 **/
55aa6985
BA		 1513static bool e1000_clean_jumbo_rx_irq(struct e1000_ring *rx_ring, int *work_done,
1514 int work_to_do)
97ac8cae 1515{
55aa6985 1516 struct e1000_adapter *adapter = rx_ring->adapter;
97ac8cae
BA		 1517 struct net_device *netdev = adapter->netdev;
1518 struct pci_dev *pdev = adapter->pdev;
5f450212 1519 union e1000_rx_desc_extended *rx_desc, *next_rxd;
97ac8cae 1520 struct e1000_buffer *buffer_info, *next_buffer;
5f450212 1521 u32 length, staterr;
97ac8cae
BA		 1522 unsigned int i;
1523 int cleaned_count = 0;
1524 bool cleaned = false;
362e20ca 1525 unsigned int total_rx_bytes = 0, total_rx_packets = 0;
17e813ec 1526 struct skb_shared_info *shinfo;
97ac8cae
BA		 1527
1528 i = rx_ring->next_to_clean;
5f450212
BA		 1529 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
1530 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
97ac8cae
BA		 1531 buffer_info = &rx_ring->buffer_info[i];
1532
5f450212 1533 while (staterr & E1000_RXD_STAT_DD) {
97ac8cae 1534 struct sk_buff *skb;
97ac8cae
BA		 1535
1536 if (*work_done >= work_to_do)
1537 break;
1538 (*work_done)++;
837a1dba 1539 dma_rmb(); /* read descriptor and rx_buffer_info after status DD */
97ac8cae 1540
97ac8cae
BA		 1541 skb = buffer_info->skb;
1542 buffer_info->skb = NULL;
1543
1544 ++i;
1545 if (i == rx_ring->count)
1546 i = 0;
5f450212 1547 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i);
97ac8cae
BA		 1548 prefetch(next_rxd);
1549
1550 next_buffer = &rx_ring->buffer_info[i];
1551
1552 cleaned = true;
1553 cleaned_count++;
0be3f55f
NN		 1554 dma_unmap_page(&pdev->dev, buffer_info->dma, PAGE_SIZE,
1555 DMA_FROM_DEVICE);
97ac8cae
BA		 1556 buffer_info->dma = 0;
1557
5f450212 1558 length = le16_to_cpu(rx_desc->wb.upper.length);
97ac8cae
BA		 1559
1560 /* errors is only valid for DD + EOP descriptors */
5f450212 1561 if (unlikely((staterr & E1000_RXD_STAT_EOP) &&
cf955e6c
BG		 1562 ((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
1563 !(netdev->features & NETIF_F_RXALL)))) {
5f450212
BA		 1564 /* recycle both page and skb */
1565 buffer_info->skb = skb;
1566 /* an error means any chain goes out the window too */
1567 if (rx_ring->rx_skb_top)
1568 dev_kfree_skb_irq(rx_ring->rx_skb_top);
1569 rx_ring->rx_skb_top = NULL;
1570 goto next_desc;
97ac8cae 1571 }
f0f1a172 1572#define rxtop (rx_ring->rx_skb_top)
5f450212 1573 if (!(staterr & E1000_RXD_STAT_EOP)) {
97ac8cae
BA		 1574 /* this descriptor is only the beginning (or middle) */
1575 if (!rxtop) {
1576 /* this is the beginning of a chain */
1577 rxtop = skb;
1578 skb_fill_page_desc(rxtop, 0, buffer_info->page,
f0ff4398 1579 0, length);
97ac8cae
BA		 1580 } else {
1581 /* this is the middle of a chain */
17e813ec
BA		 1582 shinfo = skb_shinfo(rxtop);
1583 skb_fill_page_desc(rxtop, shinfo->nr_frags,
1584 buffer_info->page, 0,
1585 length);
97ac8cae
BA		 1586 /* re-use the skb, only consumed the page */
1587 buffer_info->skb = skb;
1588 }
1589 e1000_consume_page(buffer_info, rxtop, length);
1590 goto next_desc;
1591 } else {
1592 if (rxtop) {
1593 /* end of the chain */
17e813ec
BA		 1594 shinfo = skb_shinfo(rxtop);
1595 skb_fill_page_desc(rxtop, shinfo->nr_frags,
1596 buffer_info->page, 0,
1597 length);
97ac8cae 1598 /* re-use the current skb, we only consumed the
e921eb1a
BA		 1599 * page
1600 */
97ac8cae
BA		 1601 buffer_info->skb = skb;
1602 skb = rxtop;
1603 rxtop = NULL;
1604 e1000_consume_page(buffer_info, skb, length);
1605 } else {
1606 /* no chain, got EOP, this buf is the packet
e921eb1a
BA		 1607 * copybreak to save the put_page/alloc_page
1608 */
97ac8cae
BA		 1609 if (length <= copybreak &&
1610 skb_tailroom(skb) >= length) {
1611 u8 *vaddr;
4679026d 1612 vaddr = kmap_atomic(buffer_info->page);
97ac8cae
BA		 1613 memcpy(skb_tail_pointer(skb), vaddr,
1614 length);
4679026d 1615 kunmap_atomic(vaddr);
97ac8cae 1616 /* re-use the page, so don't erase
e921eb1a
BA		 1617 * buffer_info->page
1618 */
97ac8cae
BA		 1619 skb_put(skb, length);
1620 } else {
1621 skb_fill_page_desc(skb, 0,
f0ff4398
BA		 1622 buffer_info->page, 0,
1623 length);
97ac8cae 1624 e1000_consume_page(buffer_info, skb,
f0ff4398 1625 length);
97ac8cae
BA		 1626 }
1627 }
1628 }
1629
2e1706f2
BA		 1630 /* Receive Checksum Offload */
1631 e1000_rx_checksum(adapter, staterr, skb);
97ac8cae 1632
70495a50
BA		 1633 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1634
97ac8cae
BA		 1635 /* probably a little skewed due to removing CRC */
1636 total_rx_bytes += skb->len;
1637 total_rx_packets++;
1638
1639 /* eth type trans needs skb->data to point to something */
1640 if (!pskb_may_pull(skb, ETH_HLEN)) {
44defeb3 1641 e_err("pskb_may_pull failed.\n");
ef5ab89c 1642 dev_kfree_skb_irq(skb);
97ac8cae
BA		 1643 goto next_desc;
1644 }
1645
5f450212
BA		 1646 e1000_receive_skb(adapter, netdev, skb, staterr,
1647 rx_desc->wb.upper.vlan);
97ac8cae
BA		 1648
1649next_desc:
5f450212 1650 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF);
97ac8cae
BA		 1651
1652 /* return some buffers to hardware, one at a time is too slow */
1653 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
55aa6985 1654 adapter->alloc_rx_buf(rx_ring, cleaned_count,
c2fed996 1655 GFP_ATOMIC);
97ac8cae
BA		 1656 cleaned_count = 0;
1657 }
1658
1659 /* use prefetched values */
1660 rx_desc = next_rxd;
1661 buffer_info = next_buffer;
5f450212
BA		 1662
1663 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
97ac8cae
BA		 1664 }
1665 rx_ring->next_to_clean = i;
1666
1667 cleaned_count = e1000_desc_unused(rx_ring);
1668 if (cleaned_count)
55aa6985 1669 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
97ac8cae
BA		 1670
1671 adapter->total_rx_bytes += total_rx_bytes;
1672 adapter->total_rx_packets += total_rx_packets;
97ac8cae
BA		 1673 return cleaned;
1674}
1675
bc7f75fa
AK		 1676/**
1677 * e1000_clean_rx_ring - Free Rx Buffers per Queue
55aa6985 1678 * @rx_ring: Rx descriptor ring
bc7f75fa 1679 **/
55aa6985 1680static void e1000_clean_rx_ring(struct e1000_ring *rx_ring)
bc7f75fa 1681{
55aa6985 1682 struct e1000_adapter *adapter = rx_ring->adapter;
bc7f75fa
AK		 1683 struct e1000_buffer *buffer_info;
1684 struct e1000_ps_page *ps_page;
1685 struct pci_dev *pdev = adapter->pdev;
bc7f75fa
AK		 1686 unsigned int i, j;
1687
1688 /* Free all the Rx ring sk_buffs */
1689 for (i = 0; i < rx_ring->count; i++) {
1690 buffer_info = &rx_ring->buffer_info[i];
1691 if (buffer_info->dma) {
1692 if (adapter->clean_rx == e1000_clean_rx_irq)
0be3f55f 1693 dma_unmap_single(&pdev->dev, buffer_info->dma,
bc7f75fa 1694 adapter->rx_buffer_len,
0be3f55f 1695 DMA_FROM_DEVICE);
97ac8cae 1696 else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq)
0be3f55f 1697 dma_unmap_page(&pdev->dev, buffer_info->dma,
f0ff4398 1698 PAGE_SIZE, DMA_FROM_DEVICE);
bc7f75fa 1699 else if (adapter->clean_rx == e1000_clean_rx_irq_ps)
0be3f55f 1700 dma_unmap_single(&pdev->dev, buffer_info->dma,
bc7f75fa 1701 adapter->rx_ps_bsize0,
0be3f55f 1702 DMA_FROM_DEVICE);
bc7f75fa
AK		 1703 buffer_info->dma = 0;
1704 }
1705
97ac8cae
BA		 1706 if (buffer_info->page) {
1707 put_page(buffer_info->page);
1708 buffer_info->page = NULL;
1709 }
1710
bc7f75fa
AK		 1711 if (buffer_info->skb) {
1712 dev_kfree_skb(buffer_info->skb);
1713 buffer_info->skb = NULL;
1714 }
1715
1716 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
47f44e40 1717 ps_page = &buffer_info->ps_pages[j];
bc7f75fa
AK		 1718 if (!ps_page->page)
1719 break;
0be3f55f
NN		 1720 dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1721 DMA_FROM_DEVICE);
bc7f75fa
AK		 1722 ps_page->dma = 0;
1723 put_page(ps_page->page);
1724 ps_page->page = NULL;
1725 }
1726 }
1727
1728 /* there also may be some cached data from a chained receive */
1729 if (rx_ring->rx_skb_top) {
1730 dev_kfree_skb(rx_ring->rx_skb_top);
1731 rx_ring->rx_skb_top = NULL;
1732 }
1733
bc7f75fa
AK		 1734 /* Zero out the descriptor ring */
1735 memset(rx_ring->desc, 0, rx_ring->size);
1736
1737 rx_ring->next_to_clean = 0;
1738 rx_ring->next_to_use = 0;
b94b5028 1739 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
bc7f75fa
AK		 1740}
1741
a8f88ff5
JB		 1742static void e1000e_downshift_workaround(struct work_struct *work)
1743{
1744 struct e1000_adapter *adapter = container_of(work,
17e813ec
BA		 1745 struct e1000_adapter,
1746 downshift_task);
a8f88ff5 1747
615b32af
JB		 1748 if (test_bit(__E1000_DOWN, &adapter->state))
1749 return;
1750
a8f88ff5
JB		 1751 e1000e_gig_downshift_workaround_ich8lan(&adapter->hw);
1752}
1753
bc7f75fa
AK		 1754/**
1755 * e1000_intr_msi - Interrupt Handler
1756 * @irq: interrupt number
1757 * @data: pointer to a network interface device structure
1758 **/
8bb62869 1759static irqreturn_t e1000_intr_msi(int __always_unused irq, void *data)
bc7f75fa
AK		 1760{
1761 struct net_device *netdev = data;
1762 struct e1000_adapter *adapter = netdev_priv(netdev);
1763 struct e1000_hw *hw = &adapter->hw;
1764 u32 icr = er32(ICR);
1765
e921eb1a 1766 /* read ICR disables interrupts using IAM */
573cca8c 1767 if (icr & E1000_ICR_LSC) {
f92518dd 1768 hw->mac.get_link_status = true;
e921eb1a 1769 /* ICH8 workaround-- Call gig speed drop workaround on cable
ad68076e
BA		 1770 * disconnect (LSC) before accessing any PHY registers
1771 */
bc7f75fa
AK		 1772 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1773 (!(er32(STATUS) & E1000_STATUS_LU)))
a8f88ff5 1774 schedule_work(&adapter->downshift_task);
bc7f75fa 1775
e921eb1a 1776 /* 80003ES2LAN workaround-- For packet buffer work-around on
bc7f75fa 1777 * link down event; disable receives here in the ISR and reset
ad68076e
BA		 1778 * adapter in watchdog
1779 */
bc7f75fa
AK		 1780 if (netif_carrier_ok(netdev) &&
1781 adapter->flags & FLAG_RX_NEEDS_RESTART) {
1782 /* disable receives */
1783 u32 rctl = er32(RCTL);
6cf08d1c 1784
bc7f75fa 1785 ew32(RCTL, rctl & ~E1000_RCTL_EN);
12d43f7d 1786 adapter->flags |= FLAG_RESTART_NOW;
bc7f75fa
AK		 1787 }
1788 /* guard against interrupt when we're going down */
1789 if (!test_bit(__E1000_DOWN, &adapter->state))
1790 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1791 }
1792
94fb848b 1793 /* Reset on uncorrectable ECC error */
79849ebc
DE		 1794 if ((icr & E1000_ICR_ECCER) && ((hw->mac.type == e1000_pch_lpt) ||
1795 (hw->mac.type == e1000_pch_spt))) {
94fb848b
BA		 1796 u32 pbeccsts = er32(PBECCSTS);
1797
1798 adapter->corr_errors +=
1799 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
1800 adapter->uncorr_errors +=
1801 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
1802 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
1803
1804 /* Do the reset outside of interrupt context */
1805 schedule_work(&adapter->reset_task);
1806
1807 /* return immediately since reset is imminent */
1808 return IRQ_HANDLED;
1809 }
1810
288379f0 1811 if (napi_schedule_prep(&adapter->napi)) {
bc7f75fa
AK		 1812 adapter->total_tx_bytes = 0;
1813 adapter->total_tx_packets = 0;
1814 adapter->total_rx_bytes = 0;
1815 adapter->total_rx_packets = 0;
288379f0 1816 __napi_schedule(&adapter->napi);
bc7f75fa
AK		 1817 }
1818
1819 return IRQ_HANDLED;
1820}
1821
1822/**
1823 * e1000_intr - Interrupt Handler
1824 * @irq: interrupt number
1825 * @data: pointer to a network interface device structure
1826 **/
8bb62869 1827static irqreturn_t e1000_intr(int __always_unused irq, void *data)
bc7f75fa
AK		 1828{
1829 struct net_device *netdev = data;
1830 struct e1000_adapter *adapter = netdev_priv(netdev);
1831 struct e1000_hw *hw = &adapter->hw;
bc7f75fa 1832 u32 rctl, icr = er32(ICR);
4662e82b 1833
a68ea775 1834 if (!icr || test_bit(__E1000_DOWN, &adapter->state))
e80bd1d1 1835 return IRQ_NONE; /* Not our interrupt */
bc7f75fa 1836
e921eb1a 1837 /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
ad68076e
BA		 1838 * not set, then the adapter didn't send an interrupt
1839 */
bc7f75fa
AK		 1840 if (!(icr & E1000_ICR_INT_ASSERTED))
1841 return IRQ_NONE;
1842
e921eb1a 1843 /* Interrupt Auto-Mask...upon reading ICR,
ad68076e
BA		 1844 * interrupts are masked. No need for the
1845 * IMC write
1846 */
bc7f75fa 1847
573cca8c 1848 if (icr & E1000_ICR_LSC) {
f92518dd 1849 hw->mac.get_link_status = true;
e921eb1a 1850 /* ICH8 workaround-- Call gig speed drop workaround on cable
ad68076e
BA		 1851 * disconnect (LSC) before accessing any PHY registers
1852 */
bc7f75fa
AK		 1853 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1854 (!(er32(STATUS) & E1000_STATUS_LU)))
a8f88ff5 1855 schedule_work(&adapter->downshift_task);
bc7f75fa 1856
e921eb1a 1857 /* 80003ES2LAN workaround--
bc7f75fa
AK		 1858 * For packet buffer work-around on link down event;
1859 * disable receives here in the ISR and
1860 * reset adapter in watchdog
1861 */
1862 if (netif_carrier_ok(netdev) &&
1863 (adapter->flags & FLAG_RX_NEEDS_RESTART)) {
1864 /* disable receives */
1865 rctl = er32(RCTL);
1866 ew32(RCTL, rctl & ~E1000_RCTL_EN);
12d43f7d 1867 adapter->flags |= FLAG_RESTART_NOW;
bc7f75fa
AK		 1868 }
1869 /* guard against interrupt when we're going down */
1870 if (!test_bit(__E1000_DOWN, &adapter->state))
1871 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1872 }
1873
94fb848b 1874 /* Reset on uncorrectable ECC error */
79849ebc
DE		 1875 if ((icr & E1000_ICR_ECCER) && ((hw->mac.type == e1000_pch_lpt) ||
1876 (hw->mac.type == e1000_pch_spt))) {
94fb848b
BA		 1877 u32 pbeccsts = er32(PBECCSTS);
1878
1879 adapter->corr_errors +=
1880 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
1881 adapter->uncorr_errors +=
1882 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
1883 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
1884
1885 /* Do the reset outside of interrupt context */
1886 schedule_work(&adapter->reset_task);
1887
1888 /* return immediately since reset is imminent */
1889 return IRQ_HANDLED;
1890 }
1891
288379f0 1892 if (napi_schedule_prep(&adapter->napi)) {
bc7f75fa
AK		 1893 adapter->total_tx_bytes = 0;
1894 adapter->total_tx_packets = 0;
1895 adapter->total_rx_bytes = 0;
1896 adapter->total_rx_packets = 0;
288379f0 1897 __napi_schedule(&adapter->napi);
bc7f75fa
AK		 1898 }
1899
1900 return IRQ_HANDLED;
1901}
1902
8bb62869 1903static irqreturn_t e1000_msix_other(int __always_unused irq, void *data)
4662e82b
BA		 1904{
1905 struct net_device *netdev = data;
1906 struct e1000_adapter *adapter = netdev_priv(netdev);
1907 struct e1000_hw *hw = &adapter->hw;
4662e82b 1908
16ecba59 1909 hw->mac.get_link_status = true;
4662e82b 1910
16ecba59
BP		 1911 /* guard against interrupt when we're going down */
1912 if (!test_bit(__E1000_DOWN, &adapter->state)) {
1913 mod_timer(&adapter->watchdog_timer, jiffies + 1);
1914 ew32(IMS, E1000_IMS_OTHER);
4662e82b
BA		 1915 }
1916
4662e82b
BA		 1917 return IRQ_HANDLED;
1918}
1919
8bb62869 1920static irqreturn_t e1000_intr_msix_tx(int __always_unused irq, void *data)
4662e82b
BA		 1921{
1922 struct net_device *netdev = data;
1923 struct e1000_adapter *adapter = netdev_priv(netdev);
1924 struct e1000_hw *hw = &adapter->hw;
1925 struct e1000_ring *tx_ring = adapter->tx_ring;
1926
4662e82b
BA		 1927 adapter->total_tx_bytes = 0;
1928 adapter->total_tx_packets = 0;
1929
55aa6985 1930 if (!e1000_clean_tx_irq(tx_ring))
4662e82b
BA		 1931 /* Ring was not completely cleaned, so fire another interrupt */
1932 ew32(ICS, tx_ring->ims_val);
1933
0a8047ac
BP		 1934 if (!test_bit(__E1000_DOWN, &adapter->state))
1935 ew32(IMS, adapter->tx_ring->ims_val);
1936
4662e82b
BA		 1937 return IRQ_HANDLED;
1938}
1939
8bb62869 1940static irqreturn_t e1000_intr_msix_rx(int __always_unused irq, void *data)
4662e82b
BA		 1941{
1942 struct net_device *netdev = data;
1943 struct e1000_adapter *adapter = netdev_priv(netdev);
55aa6985 1944 struct e1000_ring *rx_ring = adapter->rx_ring;
4662e82b
BA		 1945
1946 /* Write the ITR value calculated at the end of the
1947 * previous interrupt.
1948 */
55aa6985 1949 if (rx_ring->set_itr) {
b77ac46b
DF		 1950 u32 itr = rx_ring->itr_val ?
1951 1000000000 / (rx_ring->itr_val * 256) : 0;
1952
1953 writel(itr, rx_ring->itr_register);
55aa6985 1954 rx_ring->set_itr = 0;
4662e82b
BA		 1955 }
1956
288379f0 1957 if (napi_schedule_prep(&adapter->napi)) {
4662e82b
BA		 1958 adapter->total_rx_bytes = 0;
1959 adapter->total_rx_packets = 0;
288379f0 1960 __napi_schedule(&adapter->napi);
4662e82b
BA		 1961 }
1962 return IRQ_HANDLED;
1963}
1964
1965/**
1966 * e1000_configure_msix - Configure MSI-X hardware
1967 *
1968 * e1000_configure_msix sets up the hardware to properly
1969 * generate MSI-X interrupts.
1970 **/
1971static void e1000_configure_msix(struct e1000_adapter *adapter)
1972{
1973 struct e1000_hw *hw = &adapter->hw;
1974 struct e1000_ring *rx_ring = adapter->rx_ring;
1975 struct e1000_ring *tx_ring = adapter->tx_ring;
1976 int vector = 0;
1977 u32 ctrl_ext, ivar = 0;
1978
1979 adapter->eiac_mask = 0;
1980
1981 /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1982 if (hw->mac.type == e1000_82574) {
1983 u32 rfctl = er32(RFCTL);
6cf08d1c 1984
4662e82b
BA		 1985 rfctl |= E1000_RFCTL_ACK_DIS;
1986 ew32(RFCTL, rfctl);
1987 }
1988
4662e82b
BA		 1989 /* Configure Rx vector */
1990 rx_ring->ims_val = E1000_IMS_RXQ0;
1991 adapter->eiac_mask |= rx_ring->ims_val;
1992 if (rx_ring->itr_val)
1993 writel(1000000000 / (rx_ring->itr_val * 256),
c5083cf6 1994 rx_ring->itr_register);
4662e82b 1995 else
c5083cf6 1996 writel(1, rx_ring->itr_register);
4662e82b
BA		 1997 ivar = E1000_IVAR_INT_ALLOC_VALID | vector;
1998
1999 /* Configure Tx vector */
2000 tx_ring->ims_val = E1000_IMS_TXQ0;
2001 vector++;
2002 if (tx_ring->itr_val)
2003 writel(1000000000 / (tx_ring->itr_val * 256),
c5083cf6 2004 tx_ring->itr_register);
4662e82b 2005 else
c5083cf6 2006 writel(1, tx_ring->itr_register);
4662e82b
BA		 2007 adapter->eiac_mask |= tx_ring->ims_val;
2008 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8);
2009
2010 /* set vector for Other Causes, e.g. link changes */
2011 vector++;
2012 ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16);
2013 if (rx_ring->itr_val)
2014 writel(1000000000 / (rx_ring->itr_val * 256),
2015 hw->hw_addr + E1000_EITR_82574(vector));
2016 else
2017 writel(1, hw->hw_addr + E1000_EITR_82574(vector));
16ecba59 2018 adapter->eiac_mask |= E1000_IMS_OTHER;
4662e82b
BA		 2019
2020 /* Cause Tx interrupts on every write back */
2021 ivar |= (1 << 31);
2022
2023 ew32(IVAR, ivar);
2024
2025 /* enable MSI-X PBA support */
0a8047ac
BP		 2026 ctrl_ext = er32(CTRL_EXT) & ~E1000_CTRL_EXT_IAME;
2027 ctrl_ext |= E1000_CTRL_EXT_PBA_CLR | E1000_CTRL_EXT_EIAME;
4662e82b
BA		 2028 ew32(CTRL_EXT, ctrl_ext);
2029 e1e_flush();
2030}
2031
2032void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter)
2033{
2034 if (adapter->msix_entries) {
2035 pci_disable_msix(adapter->pdev);
2036 kfree(adapter->msix_entries);
2037 adapter->msix_entries = NULL;
2038 } else if (adapter->flags & FLAG_MSI_ENABLED) {
2039 pci_disable_msi(adapter->pdev);
2040 adapter->flags &= ~FLAG_MSI_ENABLED;
2041 }
4662e82b
BA		 2042}
2043
2044/**
2045 * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
2046 *
2047 * Attempt to configure interrupts using the best available
2048 * capabilities of the hardware and kernel.
2049 **/
2050void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
2051{
2052 int err;
8e86acd7 2053 int i;
4662e82b
BA		 2054
2055 switch (adapter->int_mode) {
2056 case E1000E_INT_MODE_MSIX:
2057 if (adapter->flags & FLAG_HAS_MSIX) {
8e86acd7
JK		 2058 adapter->num_vectors = 3; /* RxQ0, TxQ0 and other */
2059 adapter->msix_entries = kcalloc(adapter->num_vectors,
17e813ec
BA		 2060 sizeof(struct
2061 msix_entry),
2062 GFP_KERNEL);
4662e82b 2063 if (adapter->msix_entries) {
0cc7c959
AG		 2064 struct e1000_adapter *a = adapter;
2065
8e86acd7 2066 for (i = 0; i < adapter->num_vectors; i++)
4662e82b
BA		 2067 adapter->msix_entries[i].entry = i;
2068
0cc7c959
AG		 2069 err = pci_enable_msix_range(a->pdev,
2070 a->msix_entries,
2071 a->num_vectors,
2072 a->num_vectors);
2073 if (err > 0)
4662e82b
BA		 2074 return;
2075 }
2076 /* MSI-X failed, so fall through and try MSI */
ef456f85 2077 e_err("Failed to initialize MSI-X interrupts. Falling back to MSI interrupts.\n");
4662e82b
BA		 2078 e1000e_reset_interrupt_capability(adapter);
2079 }
2080 adapter->int_mode = E1000E_INT_MODE_MSI;
2081 /* Fall through */
2082 case E1000E_INT_MODE_MSI:
2083 if (!pci_enable_msi(adapter->pdev)) {
2084 adapter->flags |= FLAG_MSI_ENABLED;
2085 } else {
2086 adapter->int_mode = E1000E_INT_MODE_LEGACY;
ef456f85 2087 e_err("Failed to initialize MSI interrupts. Falling back to legacy interrupts.\n");
4662e82b
BA		 2088 }
2089 /* Fall through */
2090 case E1000E_INT_MODE_LEGACY:
2091 /* Don't do anything; this is the system default */
2092 break;
2093 }
8e86acd7
JK		 2094
2095 /* store the number of vectors being used */
2096 adapter->num_vectors = 1;
4662e82b
BA		 2097}
2098
2099/**
2100 * e1000_request_msix - Initialize MSI-X interrupts
2101 *
2102 * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
2103 * kernel.
2104 **/
2105static int e1000_request_msix(struct e1000_adapter *adapter)
2106{
2107 struct net_device *netdev = adapter->netdev;
2108 int err = 0, vector = 0;
2109
2110 if (strlen(netdev->name) < (IFNAMSIZ - 5))
79f5e840
BA		 2111 snprintf(adapter->rx_ring->name,
2112 sizeof(adapter->rx_ring->name) - 1,
2113 "%s-rx-0", netdev->name);
4662e82b
BA		 2114 else
2115 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
2116 err = request_irq(adapter->msix_entries[vector].vector,
a0607fd3 2117 e1000_intr_msix_rx, 0, adapter->rx_ring->name,
4662e82b
BA		 2118 netdev);
2119 if (err)
5015e53a 2120 return err;
c5083cf6
BA		 2121 adapter->rx_ring->itr_register = adapter->hw.hw_addr +
2122 E1000_EITR_82574(vector);
4662e82b
BA		 2123 adapter->rx_ring->itr_val = adapter->itr;
2124 vector++;
2125
2126 if (strlen(netdev->name) < (IFNAMSIZ - 5))
79f5e840
BA		 2127 snprintf(adapter->tx_ring->name,
2128 sizeof(adapter->tx_ring->name) - 1,
2129 "%s-tx-0", netdev->name);
4662e82b
BA		 2130 else
2131 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
2132 err = request_irq(adapter->msix_entries[vector].vector,
a0607fd3 2133 e1000_intr_msix_tx, 0, adapter->tx_ring->name,
4662e82b
BA		 2134 netdev);
2135 if (err)
5015e53a 2136 return err;
c5083cf6
BA		 2137 adapter->tx_ring->itr_register = adapter->hw.hw_addr +
2138 E1000_EITR_82574(vector);
4662e82b
BA		 2139 adapter->tx_ring->itr_val = adapter->itr;
2140 vector++;
2141
2142 err = request_irq(adapter->msix_entries[vector].vector,
a0607fd3 2143 e1000_msix_other, 0, netdev->name, netdev);
4662e82b 2144 if (err)
5015e53a 2145 return err;
4662e82b
BA		 2146
2147 e1000_configure_msix(adapter);
5015e53a 2148
4662e82b 2149 return 0;
4662e82b
BA		 2150}
2151
f8d59f78
BA		 2152/**
2153 * e1000_request_irq - initialize interrupts
2154 *
2155 * Attempts to configure interrupts using the best available
2156 * capabilities of the hardware and kernel.
2157 **/
bc7f75fa
AK		 2158static int e1000_request_irq(struct e1000_adapter *adapter)
2159{
2160 struct net_device *netdev = adapter->netdev;
bc7f75fa
AK		 2161 int err;
2162
4662e82b
BA		 2163 if (adapter->msix_entries) {
2164 err = e1000_request_msix(adapter);
2165 if (!err)
2166 return err;
2167 /* fall back to MSI */
2168 e1000e_reset_interrupt_capability(adapter);
2169 adapter->int_mode = E1000E_INT_MODE_MSI;
2170 e1000e_set_interrupt_capability(adapter);
bc7f75fa 2171 }
4662e82b 2172 if (adapter->flags & FLAG_MSI_ENABLED) {
a0607fd3 2173 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0,
4662e82b
BA		 2174 netdev->name, netdev);
2175 if (!err)
2176 return err;
bc7f75fa 2177
4662e82b
BA		 2178 /* fall back to legacy interrupt */
2179 e1000e_reset_interrupt_capability(adapter);
2180 adapter->int_mode = E1000E_INT_MODE_LEGACY;
bc7f75fa
AK		 2181 }
2182
a0607fd3 2183 err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED,
4662e82b
BA		 2184 netdev->name, netdev);
2185 if (err)
2186 e_err("Unable to allocate interrupt, Error: %d\n", err);
2187
bc7f75fa
AK		 2188 return err;
2189}
2190
2191static void e1000_free_irq(struct e1000_adapter *adapter)
2192{
2193 struct net_device *netdev = adapter->netdev;
2194
4662e82b
BA		 2195 if (adapter->msix_entries) {
2196 int vector = 0;
2197
2198 free_irq(adapter->msix_entries[vector].vector, netdev);
2199 vector++;
2200
2201 free_irq(adapter->msix_entries[vector].vector, netdev);
2202 vector++;
2203
2204 /* Other Causes interrupt vector */
2205 free_irq(adapter->msix_entries[vector].vector, netdev);
2206 return;
bc7f75fa 2207 }
4662e82b
BA		 2208
2209 free_irq(adapter->pdev->irq, netdev);
bc7f75fa
AK		 2210}
2211
2212/**
2213 * e1000_irq_disable - Mask off interrupt generation on the NIC
2214 **/
2215static void e1000_irq_disable(struct e1000_adapter *adapter)
2216{
2217 struct e1000_hw *hw = &adapter->hw;
2218
bc7f75fa 2219 ew32(IMC, ~0);
4662e82b
BA		 2220 if (adapter->msix_entries)
2221 ew32(EIAC_82574, 0);
bc7f75fa 2222 e1e_flush();
8e86acd7
JK		 2223
2224 if (adapter->msix_entries) {
2225 int i;
6cf08d1c 2226
8e86acd7
JK		 2227 for (i = 0; i < adapter->num_vectors; i++)
2228 synchronize_irq(adapter->msix_entries[i].vector);
2229 } else {
2230 synchronize_irq(adapter->pdev->irq);
2231 }
bc7f75fa
AK		 2232}
2233
2234/**
2235 * e1000_irq_enable - Enable default interrupt generation settings
2236 **/
2237static void e1000_irq_enable(struct e1000_adapter *adapter)
2238{
2239 struct e1000_hw *hw = &adapter->hw;
2240
4662e82b
BA		 2241 if (adapter->msix_entries) {
2242 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
16ecba59 2243 ew32(IMS, adapter->eiac_mask | E1000_IMS_LSC);
79849ebc
DE		 2244 } else if ((hw->mac.type == e1000_pch_lpt) ||
2245 (hw->mac.type == e1000_pch_spt)) {
94fb848b 2246 ew32(IMS, IMS_ENABLE_MASK | E1000_IMS_ECCER);
4662e82b
BA		 2247 } else {
2248 ew32(IMS, IMS_ENABLE_MASK);
2249 }
74ef9c39 2250 e1e_flush();
bc7f75fa
AK		 2251}
2252
2253/**
31dbe5b4 2254 * e1000e_get_hw_control - get control of the h/w from f/w
bc7f75fa
AK		 2255 * @adapter: address of board private structure
2256 *
31dbe5b4 2257 * e1000e_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
bc7f75fa
AK		 2258 * For ASF and Pass Through versions of f/w this means that
2259 * the driver is loaded. For AMT version (only with 82573)
2260 * of the f/w this means that the network i/f is open.
2261 **/
31dbe5b4 2262void e1000e_get_hw_control(struct e1000_adapter *adapter)
bc7f75fa
AK		 2263{
2264 struct e1000_hw *hw = &adapter->hw;
2265 u32 ctrl_ext;
2266 u32 swsm;
2267
2268 /* Let firmware know the driver has taken over */
2269 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2270 swsm = er32(SWSM);
2271 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
2272 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2273 ctrl_ext = er32(CTRL_EXT);
ad68076e 2274 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
bc7f75fa
AK		 2275 }
2276}
2277
2278/**
31dbe5b4 2279 * e1000e_release_hw_control - release control of the h/w to f/w
bc7f75fa
AK		 2280 * @adapter: address of board private structure
2281 *
31dbe5b4 2282 * e1000e_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
bc7f75fa
AK		 2283 * For ASF and Pass Through versions of f/w this means that the
2284 * driver is no longer loaded. For AMT version (only with 82573) i
2285 * of the f/w this means that the network i/f is closed.
2286 *
2287 **/
31dbe5b4 2288void e1000e_release_hw_control(struct e1000_adapter *adapter)
bc7f75fa
AK		 2289{
2290 struct e1000_hw *hw = &adapter->hw;
2291 u32 ctrl_ext;
2292 u32 swsm;
2293
2294 /* Let firmware taken over control of h/w */
2295 if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2296 swsm = er32(SWSM);
2297 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
2298 } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2299 ctrl_ext = er32(CTRL_EXT);
ad68076e 2300 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
bc7f75fa
AK		 2301 }
2302}
2303
bc7f75fa 2304/**
49ce9c2c 2305 * e1000_alloc_ring_dma - allocate memory for a ring structure
bc7f75fa
AK		 2306 **/
2307static int e1000_alloc_ring_dma(struct e1000_adapter *adapter,
2308 struct e1000_ring *ring)
2309{
2310 struct pci_dev *pdev = adapter->pdev;
2311
2312 ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma,
2313 GFP_KERNEL);
2314 if (!ring->desc)
2315 return -ENOMEM;
2316
2317 return 0;
2318}
2319
2320/**
2321 * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
55aa6985 2322 * @tx_ring: Tx descriptor ring
bc7f75fa
AK		 2323 *
2324 * Return 0 on success, negative on failure
2325 **/
55aa6985 2326int e1000e_setup_tx_resources(struct e1000_ring *tx_ring)
bc7f75fa 2327{
55aa6985 2328 struct e1000_adapter *adapter = tx_ring->adapter;
bc7f75fa
AK		 2329 int err = -ENOMEM, size;
2330
2331 size = sizeof(struct e1000_buffer) * tx_ring->count;
89bf67f1 2332 tx_ring->buffer_info = vzalloc(size);
bc7f75fa
AK		 2333 if (!tx_ring->buffer_info)
2334 goto err;
bc7f75fa
AK		 2335
2336 /* round up to nearest 4K */
2337 tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
2338 tx_ring->size = ALIGN(tx_ring->size, 4096);
2339
2340 err = e1000_alloc_ring_dma(adapter, tx_ring);
2341 if (err)
2342 goto err;
2343
2344 tx_ring->next_to_use = 0;
2345 tx_ring->next_to_clean = 0;
bc7f75fa
AK		 2346
2347 return 0;
2348err:
2349 vfree(tx_ring->buffer_info);
44defeb3 2350 e_err("Unable to allocate memory for the transmit descriptor ring\n");
bc7f75fa
AK		 2351 return err;
2352}
2353
2354/**
2355 * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
55aa6985 2356 * @rx_ring: Rx descriptor ring
bc7f75fa
AK		 2357 *
2358 * Returns 0 on success, negative on failure
2359 **/
55aa6985 2360int e1000e_setup_rx_resources(struct e1000_ring *rx_ring)
bc7f75fa 2361{
55aa6985 2362 struct e1000_adapter *adapter = rx_ring->adapter;
47f44e40
AK		 2363 struct e1000_buffer *buffer_info;
2364 int i, size, desc_len, err = -ENOMEM;
bc7f75fa
AK		 2365
2366 size = sizeof(struct e1000_buffer) * rx_ring->count;
89bf67f1 2367 rx_ring->buffer_info = vzalloc(size);
bc7f75fa
AK		 2368 if (!rx_ring->buffer_info)
2369 goto err;
bc7f75fa 2370
47f44e40
AK		 2371 for (i = 0; i < rx_ring->count; i++) {
2372 buffer_info = &rx_ring->buffer_info[i];
2373 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
2374 sizeof(struct e1000_ps_page),
2375 GFP_KERNEL);
2376 if (!buffer_info->ps_pages)
2377 goto err_pages;
2378 }
bc7f75fa
AK		 2379
2380 desc_len = sizeof(union e1000_rx_desc_packet_split);
2381
2382 /* Round up to nearest 4K */
2383 rx_ring->size = rx_ring->count * desc_len;
2384 rx_ring->size = ALIGN(rx_ring->size, 4096);
2385
2386 err = e1000_alloc_ring_dma(adapter, rx_ring);
2387 if (err)
47f44e40 2388 goto err_pages;
bc7f75fa
AK		 2389
2390 rx_ring->next_to_clean = 0;
2391 rx_ring->next_to_use = 0;
2392 rx_ring->rx_skb_top = NULL;
2393
2394 return 0;
47f44e40
AK		 2395
2396err_pages:
2397 for (i = 0; i < rx_ring->count; i++) {
2398 buffer_info = &rx_ring->buffer_info[i];
2399 kfree(buffer_info->ps_pages);
2400 }
bc7f75fa
AK		 2401err:
2402 vfree(rx_ring->buffer_info);
e9262447 2403 e_err("Unable to allocate memory for the receive descriptor ring\n");
bc7f75fa
AK		 2404 return err;
2405}
2406
2407/**
2408 * e1000_clean_tx_ring - Free Tx Buffers
55aa6985 2409 * @tx_ring: Tx descriptor ring
bc7f75fa 2410 **/
55aa6985 2411static void e1000_clean_tx_ring(struct e1000_ring *tx_ring)
bc7f75fa 2412{
55aa6985 2413 struct e1000_adapter *adapter = tx_ring->adapter;
bc7f75fa
AK		 2414 struct e1000_buffer *buffer_info;
2415 unsigned long size;
2416 unsigned int i;
2417
2418 for (i = 0; i < tx_ring->count; i++) {
2419 buffer_info = &tx_ring->buffer_info[i];
55aa6985 2420 e1000_put_txbuf(tx_ring, buffer_info);
bc7f75fa
AK		 2421 }
2422
3f0cfa3b 2423 netdev_reset_queue(adapter->netdev);
bc7f75fa
AK		 2424 size = sizeof(struct e1000_buffer) * tx_ring->count;
2425 memset(tx_ring->buffer_info, 0, size);
2426
2427 memset(tx_ring->desc, 0, tx_ring->size);
2428
2429 tx_ring->next_to_use = 0;
2430 tx_ring->next_to_clean = 0;
bc7f75fa
AK		 2431}
2432
2433/**
2434 * e1000e_free_tx_resources - Free Tx Resources per Queue
55aa6985 2435 * @tx_ring: Tx descriptor ring
bc7f75fa
AK		 2436 *
2437 * Free all transmit software resources
2438 **/
55aa6985 2439void e1000e_free_tx_resources(struct e1000_ring *tx_ring)
bc7f75fa 2440{
55aa6985 2441 struct e1000_adapter *adapter = tx_ring->adapter;
bc7f75fa 2442 struct pci_dev *pdev = adapter->pdev;
bc7f75fa 2443
55aa6985 2444 e1000_clean_tx_ring(tx_ring);
bc7f75fa
AK		 2445
2446 vfree(tx_ring->buffer_info);
2447 tx_ring->buffer_info = NULL;
2448
2449 dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
2450 tx_ring->dma);
2451 tx_ring->desc = NULL;
2452}
2453
2454/**
2455 * e1000e_free_rx_resources - Free Rx Resources
55aa6985 2456 * @rx_ring: Rx descriptor ring
bc7f75fa
AK		 2457 *
2458 * Free all receive software resources
2459 **/
55aa6985 2460void e1000e_free_rx_resources(struct e1000_ring *rx_ring)
bc7f75fa 2461{
55aa6985 2462 struct e1000_adapter *adapter = rx_ring->adapter;
bc7f75fa 2463 struct pci_dev *pdev = adapter->pdev;
47f44e40 2464 int i;
bc7f75fa 2465
55aa6985 2466 e1000_clean_rx_ring(rx_ring);
bc7f75fa 2467
b1cdfead 2468 for (i = 0; i < rx_ring->count; i++)
47f44e40 2469 kfree(rx_ring->buffer_info[i].ps_pages);
47f44e40 2470
bc7f75fa
AK		 2471 vfree(rx_ring->buffer_info);
2472 rx_ring->buffer_info = NULL;
2473
bc7f75fa
AK		 2474 dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2475 rx_ring->dma);
2476 rx_ring->desc = NULL;
2477}
2478
2479/**
2480 * e1000_update_itr - update the dynamic ITR value based on statistics
489815ce
AK		 2481 * @adapter: pointer to adapter
2482 * @itr_setting: current adapter->itr
2483 * @packets: the number of packets during this measurement interval
2484 * @bytes: the number of bytes during this measurement interval
2485 *
bc7f75fa
AK		 2486 * Stores a new ITR value based on packets and byte
2487 * counts during the last interrupt. The advantage of per interrupt
2488 * computation is faster updates and more accurate ITR for the current
2489 * traffic pattern. Constants in this function were computed
2490 * based on theoretical maximum wire speed and thresholds were set based
2491 * on testing data as well as attempting to minimize response time
4662e82b
BA		 2492 * while increasing bulk throughput. This functionality is controlled
2493 * by the InterruptThrottleRate module parameter.
bc7f75fa 2494 **/
8bb62869 2495static unsigned int e1000_update_itr(u16 itr_setting, int packets, int bytes)
bc7f75fa
AK		 2496{
2497 unsigned int retval = itr_setting;
2498
2499 if (packets == 0)
5015e53a 2500 return itr_setting;
bc7f75fa
AK		 2501
2502 switch (itr_setting) {
2503 case lowest_latency:
2504 /* handle TSO and jumbo frames */
362e20ca 2505 if (bytes / packets > 8000)
bc7f75fa 2506 retval = bulk_latency;
b1cdfead 2507 else if ((packets < 5) && (bytes > 512))
bc7f75fa 2508 retval = low_latency;
bc7f75fa 2509 break;
e80bd1d1 2510 case low_latency: /* 50 usec aka 20000 ints/s */
bc7f75fa
AK		 2511 if (bytes > 10000) {
2512 /* this if handles the TSO accounting */
362e20ca 2513 if (bytes / packets > 8000)
bc7f75fa 2514 retval = bulk_latency;
362e20ca 2515 else if ((packets < 10) || ((bytes / packets) > 1200))
bc7f75fa 2516 retval = bulk_latency;
b1cdfead 2517 else if ((packets > 35))
bc7f75fa 2518 retval = lowest_latency;
362e20ca 2519 } else if (bytes / packets > 2000) {
bc7f75fa
AK		 2520 retval = bulk_latency;
2521 } else if (packets <= 2 && bytes < 512) {
2522 retval = lowest_latency;
2523 }
2524 break;
e80bd1d1 2525 case bulk_latency: /* 250 usec aka 4000 ints/s */
bc7f75fa 2526 if (bytes > 25000) {
b1cdfead 2527 if (packets > 35)
bc7f75fa 2528 retval = low_latency;
bc7f75fa
AK		 2529 } else if (bytes < 6000) {
2530 retval = low_latency;
2531 }
2532 break;
2533 }
2534
bc7f75fa
AK		 2535 return retval;
2536}
2537
2538static void e1000_set_itr(struct e1000_adapter *adapter)
2539{
bc7f75fa
AK		 2540 u16 current_itr;
2541 u32 new_itr = adapter->itr;
2542
2543 /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2544 if (adapter->link_speed != SPEED_1000) {
2545 current_itr = 0;
2546 new_itr = 4000;
2547 goto set_itr_now;
2548 }
2549
828bac87
BA		 2550 if (adapter->flags2 & FLAG2_DISABLE_AIM) {
2551 new_itr = 0;
2552 goto set_itr_now;
2553 }
2554
8bb62869
BA		 2555 adapter->tx_itr = e1000_update_itr(adapter->tx_itr,
2556 adapter->total_tx_packets,
2557 adapter->total_tx_bytes);
bc7f75fa
AK		 2558 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2559 if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2560 adapter->tx_itr = low_latency;
2561
8bb62869
BA		 2562 adapter->rx_itr = e1000_update_itr(adapter->rx_itr,
2563 adapter->total_rx_packets,
2564 adapter->total_rx_bytes);
bc7f75fa
AK		 2565 /* conservative mode (itr 3) eliminates the lowest_latency setting */
2566 if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2567 adapter->rx_itr = low_latency;
2568
2569 current_itr = max(adapter->rx_itr, adapter->tx_itr);
2570
bc7f75fa 2571 /* counts and packets in update_itr are dependent on these numbers */
33550cec 2572 switch (current_itr) {
bc7f75fa
AK		 2573 case lowest_latency:
2574 new_itr = 70000;
2575 break;
2576 case low_latency:
e80bd1d1 2577 new_itr = 20000; /* aka hwitr = ~200 */
bc7f75fa
AK		 2578 break;
2579 case bulk_latency:
2580 new_itr = 4000;
2581 break;
2582 default:
2583 break;
2584 }
2585
2586set_itr_now:
2587 if (new_itr != adapter->itr) {
e921eb1a 2588 /* this attempts to bias the interrupt rate towards Bulk
bc7f75fa 2589 * by adding intermediate steps when interrupt rate is
ad68076e
BA		 2590 * increasing
2591 */
bc7f75fa 2592 new_itr = new_itr > adapter->itr ?
f0ff4398 2593 min(adapter->itr + (new_itr >> 2), new_itr) : new_itr;
bc7f75fa 2594 adapter->itr = new_itr;
4662e82b
BA		 2595 adapter->rx_ring->itr_val = new_itr;
2596 if (adapter->msix_entries)
2597 adapter->rx_ring->set_itr = 1;
2598 else
e3d14b08 2599 e1000e_write_itr(adapter, new_itr);
bc7f75fa
AK		 2600 }
2601}
2602
22a4cca2
MV		 2603/**
2604 * e1000e_write_itr - write the ITR value to the appropriate registers
2605 * @adapter: address of board private structure
2606 * @itr: new ITR value to program
2607 *
2608 * e1000e_write_itr determines if the adapter is in MSI-X mode
2609 * and, if so, writes the EITR registers with the ITR value.
2610 * Otherwise, it writes the ITR value into the ITR register.
2611 **/
2612void e1000e_write_itr(struct e1000_adapter *adapter, u32 itr)
2613{
2614 struct e1000_hw *hw = &adapter->hw;
2615 u32 new_itr = itr ? 1000000000 / (itr * 256) : 0;
2616
2617 if (adapter->msix_entries) {
2618 int vector;
2619
2620 for (vector = 0; vector < adapter->num_vectors; vector++)
2621 writel(new_itr, hw->hw_addr + E1000_EITR_82574(vector));
2622 } else {
2623 ew32(ITR, new_itr);
2624 }
2625}
2626
4662e82b
BA		 2627/**
2628 * e1000_alloc_queues - Allocate memory for all rings
2629 * @adapter: board private structure to initialize
2630 **/
9f9a12f8 2631static int e1000_alloc_queues(struct e1000_adapter *adapter)
4662e82b 2632{
55aa6985
BA		 2633 int size = sizeof(struct e1000_ring);
2634
2635 adapter->tx_ring = kzalloc(size, GFP_KERNEL);
4662e82b
BA		 2636 if (!adapter->tx_ring)
2637 goto err;
55aa6985
BA		 2638 adapter->tx_ring->count = adapter->tx_ring_count;
2639 adapter->tx_ring->adapter = adapter;
4662e82b 2640
55aa6985 2641 adapter->rx_ring = kzalloc(size, GFP_KERNEL);
4662e82b
BA		 2642 if (!adapter->rx_ring)
2643 goto err;
55aa6985
BA		 2644 adapter->rx_ring->count = adapter->rx_ring_count;
2645 adapter->rx_ring->adapter = adapter;
4662e82b
BA		 2646
2647 return 0;
2648err:
2649 e_err("Unable to allocate memory for queues\n");
2650 kfree(adapter->rx_ring);
2651 kfree(adapter->tx_ring);
2652 return -ENOMEM;
2653}
2654
bc7f75fa 2655/**
c58c8a78 2656 * e1000e_poll - NAPI Rx polling callback
ad68076e 2657 * @napi: struct associated with this polling callback
c58c8a78 2658 * @weight: number of packets driver is allowed to process this poll
bc7f75fa 2659 **/
c58c8a78 2660static int e1000e_poll(struct napi_struct *napi, int weight)
bc7f75fa 2661{
c58c8a78
BA		 2662 struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter,
2663 napi);
4662e82b 2664 struct e1000_hw *hw = &adapter->hw;
bc7f75fa 2665 struct net_device *poll_dev = adapter->netdev;
679e8a0f 2666 int tx_cleaned = 1, work_done = 0;
bc7f75fa 2667
4cf1653a 2668 adapter = netdev_priv(poll_dev);
bc7f75fa 2669
c58c8a78
BA		 2670 if (!adapter->msix_entries ||
2671 (adapter->rx_ring->ims_val & adapter->tx_ring->ims_val))
2672 tx_cleaned = e1000_clean_tx_irq(adapter->tx_ring);
4662e82b 2673
c58c8a78 2674 adapter->clean_rx(adapter->rx_ring, &work_done, weight);
d2c7ddd6 2675
12d04a3c 2676 if (!tx_cleaned)
c58c8a78 2677 work_done = weight;
bc7f75fa 2678
c58c8a78
BA		 2679 /* If weight not fully consumed, exit the polling mode */
2680 if (work_done < weight) {
bc7f75fa
AK		 2681 if (adapter->itr_setting & 3)
2682 e1000_set_itr(adapter);
32b3e08f 2683 napi_complete_done(napi, work_done);
a3c69fef
JB		 2684 if (!test_bit(__E1000_DOWN, &adapter->state)) {
2685 if (adapter->msix_entries)
2686 ew32(IMS, adapter->rx_ring->ims_val);
2687 else
2688 e1000_irq_enable(adapter);
2689 }
bc7f75fa
AK		 2690 }
2691
2692 return work_done;
2693}
2694
80d5c368 2695static int e1000_vlan_rx_add_vid(struct net_device *netdev,
603cdca9 2696 __always_unused __be16 proto, u16 vid)
bc7f75fa
AK		 2697{
2698 struct e1000_adapter *adapter = netdev_priv(netdev);
2699 struct e1000_hw *hw = &adapter->hw;
2700 u32 vfta, index;
2701
2702 /* don't update vlan cookie if already programmed */
2703 if ((adapter->hw.mng_cookie.status &
2704 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2705 (vid == adapter->mng_vlan_id))
8e586137 2706 return 0;
caaddaf8 2707
bc7f75fa 2708 /* add VID to filter table */
caaddaf8
BA		 2709 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2710 index = (vid >> 5) & 0x7F;
2711 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2712 vfta |= (1 << (vid & 0x1F));
2713 hw->mac.ops.write_vfta(hw, index, vfta);
2714 }
86d70e53
JK		 2715
2716 set_bit(vid, adapter->active_vlans);
8e586137
JP		 2717
2718 return 0;
bc7f75fa
AK		 2719}
2720
80d5c368 2721static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
603cdca9 2722 __always_unused __be16 proto, u16 vid)
bc7f75fa
AK		 2723{
2724 struct e1000_adapter *adapter = netdev_priv(netdev);
2725 struct e1000_hw *hw = &adapter->hw;
2726 u32 vfta, index;
2727
bc7f75fa
AK		 2728 if ((adapter->hw.mng_cookie.status &
2729 E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2730 (vid == adapter->mng_vlan_id)) {
2731 /* release control to f/w */
31dbe5b4 2732 e1000e_release_hw_control(adapter);
8e586137 2733 return 0;
bc7f75fa
AK		 2734 }
2735
2736 /* remove VID from filter table */
caaddaf8
BA		 2737 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2738 index = (vid >> 5) & 0x7F;
2739 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2740 vfta &= ~(1 << (vid & 0x1F));
2741 hw->mac.ops.write_vfta(hw, index, vfta);
2742 }
86d70e53
JK		 2743
2744 clear_bit(vid, adapter->active_vlans);
8e586137
JP		 2745
2746 return 0;
bc7f75fa
AK		 2747}
2748
86d70e53
JK		 2749/**
2750 * e1000e_vlan_filter_disable - helper to disable hw VLAN filtering
2751 * @adapter: board private structure to initialize
2752 **/
2753static void e1000e_vlan_filter_disable(struct e1000_adapter *adapter)
bc7f75fa
AK		 2754{
2755 struct net_device *netdev = adapter->netdev;
86d70e53
JK		 2756 struct e1000_hw *hw = &adapter->hw;
2757 u32 rctl;
bc7f75fa 2758
86d70e53
JK		 2759 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2760 /* disable VLAN receive filtering */
2761 rctl = er32(RCTL);
2762 rctl &= ~(E1000_RCTL_VFE | E1000_RCTL_CFIEN);
2763 ew32(RCTL, rctl);
2764
2765 if (adapter->mng_vlan_id != (u16)E1000_MNG_VLAN_NONE) {
80d5c368
PM		 2766 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
2767 adapter->mng_vlan_id);
86d70e53 2768 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
bc7f75fa 2769 }
bc7f75fa
AK		 2770 }
2771}
2772
86d70e53
JK		 2773/**
2774 * e1000e_vlan_filter_enable - helper to enable HW VLAN filtering
2775 * @adapter: board private structure to initialize
2776 **/
2777static void e1000e_vlan_filter_enable(struct e1000_adapter *adapter)
2778{
2779 struct e1000_hw *hw = &adapter->hw;
2780 u32 rctl;
2781
2782 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2783 /* enable VLAN receive filtering */
2784 rctl = er32(RCTL);
2785 rctl |= E1000_RCTL_VFE;
2786 rctl &= ~E1000_RCTL_CFIEN;
2787 ew32(RCTL, rctl);
2788 }
2789}
bc7f75fa 2790
86d70e53
JK		 2791/**
2792 * e1000e_vlan_strip_enable - helper to disable HW VLAN stripping
2793 * @adapter: board private structure to initialize
2794 **/
2795static void e1000e_vlan_strip_disable(struct e1000_adapter *adapter)
bc7f75fa 2796{
bc7f75fa 2797 struct e1000_hw *hw = &adapter->hw;
86d70e53 2798 u32 ctrl;
bc7f75fa 2799
86d70e53
JK		 2800 /* disable VLAN tag insert/strip */
2801 ctrl = er32(CTRL);
2802 ctrl &= ~E1000_CTRL_VME;
2803 ew32(CTRL, ctrl);
2804}
bc7f75fa 2805
86d70e53
JK		 2806/**
2807 * e1000e_vlan_strip_enable - helper to enable HW VLAN stripping
2808 * @adapter: board private structure to initialize
2809 **/
2810static void e1000e_vlan_strip_enable(struct e1000_adapter *adapter)
2811{
2812 struct e1000_hw *hw = &adapter->hw;
2813 u32 ctrl;
bc7f75fa 2814
86d70e53
JK		 2815 /* enable VLAN tag insert/strip */
2816 ctrl = er32(CTRL);
2817 ctrl |= E1000_CTRL_VME;
2818 ew32(CTRL, ctrl);
2819}
bc7f75fa 2820
86d70e53
JK		 2821static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
2822{
2823 struct net_device *netdev = adapter->netdev;
2824 u16 vid = adapter->hw.mng_cookie.vlan_id;
2825 u16 old_vid = adapter->mng_vlan_id;
2826
e5fe2541 2827 if (adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
80d5c368 2828 e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);
86d70e53 2829 adapter->mng_vlan_id = vid;
bc7f75fa
AK		 2830 }
2831
86d70e53 2832 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && (vid != old_vid))
80d5c368 2833 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), old_vid);
bc7f75fa
AK		 2834}
2835
2836static void e1000_restore_vlan(struct e1000_adapter *adapter)
2837{
2838 u16 vid;
2839
80d5c368 2840 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0);
bc7f75fa 2841
86d70e53 2842 for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
80d5c368 2843 e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
bc7f75fa
AK		 2844}
2845
cd791618 2846static void e1000_init_manageability_pt(struct e1000_adapter *adapter)
bc7f75fa
AK		 2847{
2848 struct e1000_hw *hw = &adapter->hw;
cd791618 2849 u32 manc, manc2h, mdef, i, j;
bc7f75fa
AK		 2850
2851 if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
2852 return;
2853
2854 manc = er32(MANC);
2855
e921eb1a 2856 /* enable receiving management packets to the host. this will probably
bc7f75fa 2857 * generate destination unreachable messages from the host OS, but
ad68076e
BA		 2858 * the packets will be handled on SMBUS
2859 */
bc7f75fa
AK		 2860 manc |= E1000_MANC_EN_MNG2HOST;
2861 manc2h = er32(MANC2H);
cd791618
BA		 2862
2863 switch (hw->mac.type) {
2864 default:
2865 manc2h |= (E1000_MANC2H_PORT_623 | E1000_MANC2H_PORT_664);
2866 break;
2867 case e1000_82574:
2868 case e1000_82583:
e921eb1a 2869 /* Check if IPMI pass-through decision filter already exists;
cd791618
BA		 2870 * if so, enable it.
2871 */
2872 for (i = 0, j = 0; i < 8; i++) {
2873 mdef = er32(MDEF(i));
2874
2875 /* Ignore filters with anything other than IPMI ports */
3b21b508 2876 if (mdef & ~(E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
cd791618
BA		 2877 continue;
2878
2879 /* Enable this decision filter in MANC2H */
2880 if (mdef)
2881 manc2h |= (1 << i);
2882
2883 j |= mdef;
2884 }
2885
2886 if (j == (E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
2887 break;
2888
2889 /* Create new decision filter in an empty filter */
2890 for (i = 0, j = 0; i < 8; i++)
2891 if (er32(MDEF(i)) == 0) {
2892 ew32(MDEF(i), (E1000_MDEF_PORT_623 |
2893 E1000_MDEF_PORT_664));
2894 manc2h |= (1 << 1);
2895 j++;
2896 break;
2897 }
2898
2899 if (!j)
2900 e_warn("Unable to create IPMI pass-through filter\n");
2901 break;
2902 }
2903
bc7f75fa
AK		 2904 ew32(MANC2H, manc2h);
2905 ew32(MANC, manc);
2906}
2907
2908/**
af667a29 2909 * e1000_configure_tx - Configure Transmit Unit after Reset
bc7f75fa
AK		 2910 * @adapter: board private structure
2911 *
2912 * Configure the Tx unit of the MAC after a reset.
2913 **/
2914static void e1000_configure_tx(struct e1000_adapter *adapter)
2915{
2916 struct e1000_hw *hw = &adapter->hw;
2917 struct e1000_ring *tx_ring = adapter->tx_ring;
2918 u64 tdba;
e7e834aa 2919 u32 tdlen, tctl, tarc;
bc7f75fa
AK		 2920
2921 /* Setup the HW Tx Head and Tail descriptor pointers */
2922 tdba = tx_ring->dma;
2923 tdlen = tx_ring->count * sizeof(struct e1000_tx_desc);
1e36052e
BA		 2924 ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
2925 ew32(TDBAH(0), (tdba >> 32));
2926 ew32(TDLEN(0), tdlen);
2927 ew32(TDH(0), 0);
2928 ew32(TDT(0), 0);
2929 tx_ring->head = adapter->hw.hw_addr + E1000_TDH(0);
2930 tx_ring->tail = adapter->hw.hw_addr + E1000_TDT(0);
bc7f75fa 2931
0845d45e
JJB		 2932 writel(0, tx_ring->head);
2933 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
2934 e1000e_update_tdt_wa(tx_ring, 0);
2935 else
2936 writel(0, tx_ring->tail);
2937
bc7f75fa
AK		 2938 /* Set the Tx Interrupt Delay register */
2939 ew32(TIDV, adapter->tx_int_delay);
ad68076e 2940 /* Tx irq moderation */
bc7f75fa
AK		 2941 ew32(TADV, adapter->tx_abs_int_delay);
2942
3a3b7586
JB		 2943 if (adapter->flags2 & FLAG2_DMA_BURST) {
2944 u32 txdctl = er32(TXDCTL(0));
6cf08d1c 2945
3a3b7586
JB		 2946 txdctl &= ~(E1000_TXDCTL_PTHRESH | E1000_TXDCTL_HTHRESH |
2947 E1000_TXDCTL_WTHRESH);
e921eb1a 2948 /* set up some performance related parameters to encourage the
3a3b7586
JB		 2949 * hardware to use the bus more efficiently in bursts, depends
2950 * on the tx_int_delay to be enabled,
8edc0e62 2951 * wthresh = 1 ==> burst write is disabled to avoid Tx stalls
3a3b7586
JB		 2952 * hthresh = 1 ==> prefetch when one or more available
2953 * pthresh = 0x1f ==> prefetch if internal cache 31 or less
2954 * BEWARE: this seems to work but should be considered first if
af667a29 2955 * there are Tx hangs or other Tx related bugs
3a3b7586
JB		 2956 */
2957 txdctl |= E1000_TXDCTL_DMA_BURST_ENABLE;
2958 ew32(TXDCTL(0), txdctl);
3a3b7586 2959 }
56032be7
BA		 2960 /* erratum work around: set txdctl the same for both queues */
2961 ew32(TXDCTL(1), er32(TXDCTL(0)));
3a3b7586 2962
e7e834aa
DE		 2963 /* Program the Transmit Control Register */
2964 tctl = er32(TCTL);
2965 tctl &= ~E1000_TCTL_CT;
2966 tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
2967 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
2968
bc7f75fa 2969 if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
e9ec2c0f 2970 tarc = er32(TARC(0));
e921eb1a 2971 /* set the speed mode bit, we'll clear it if we're not at
ad68076e
BA		 2972 * gigabit link later
2973 */
bc7f75fa
AK		 2974#define SPEED_MODE_BIT (1 << 21)
2975 tarc |= SPEED_MODE_BIT;
e9ec2c0f 2976 ew32(TARC(0), tarc);
bc7f75fa
AK		 2977 }
2978
2979 /* errata: program both queues to unweighted RR */
2980 if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
e9ec2c0f 2981 tarc = er32(TARC(0));
bc7f75fa 2982 tarc |= 1;
e9ec2c0f
JK		 2983 ew32(TARC(0), tarc);
2984 tarc = er32(TARC(1));
bc7f75fa 2985 tarc |= 1;
e9ec2c0f 2986 ew32(TARC(1), tarc);
bc7f75fa
AK		 2987 }
2988
bc7f75fa
AK		 2989 /* Setup Transmit Descriptor Settings for eop descriptor */
2990 adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
2991
2992 /* only set IDE if we are delaying interrupts using the timers */
2993 if (adapter->tx_int_delay)
2994 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
2995
2996 /* enable Report Status bit */
2997 adapter->txd_cmd |= E1000_TXD_CMD_RS;
2998
e7e834aa
DE		 2999 ew32(TCTL, tctl);
3000
57cde763 3001 hw->mac.ops.config_collision_dist(hw);
79849ebc
DE		 3002
3003 /* SPT Si errata workaround to avoid data corruption */
3004 if (hw->mac.type == e1000_pch_spt) {
3005 u32 reg_val;
3006
3007 reg_val = er32(IOSFPC);
3008 reg_val |= E1000_RCTL_RDMTS_HEX;
3009 ew32(IOSFPC, reg_val);
3010
3011 reg_val = er32(TARC(0));
3012 reg_val |= E1000_TARC0_CB_MULTIQ_3_REQ;
3013 ew32(TARC(0), reg_val);
3014 }
bc7f75fa
AK		 3015}
3016
3017/**
3018 * e1000_setup_rctl - configure the receive control registers
3019 * @adapter: Board private structure
3020 **/
3021#define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
3022 (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
3023static void e1000_setup_rctl(struct e1000_adapter *adapter)
3024{
3025 struct e1000_hw *hw = &adapter->hw;
3026 u32 rctl, rfctl;
bc7f75fa
AK		 3027 u32 pages = 0;
3028
b20a7744
DE		 3029 /* Workaround Si errata on PCHx - configure jumbo frame flow.
3030 * If jumbo frames not set, program related MAC/PHY registers
3031 * to h/w defaults
3032 */
3033 if (hw->mac.type >= e1000_pch2lan) {
3034 s32 ret_val;
3035
3036 if (adapter->netdev->mtu > ETH_DATA_LEN)
3037 ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, true);
3038 else
3039 ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, false);
3040
3041 if (ret_val)
3042 e_dbg("failed to enable|disable jumbo frame workaround mode\n");
3043 }
a1ce6473 3044
bc7f75fa
AK		 3045 /* Program MC offset vector base */
3046 rctl = er32(RCTL);
3047 rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
3048 rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
f0ff4398
BA		 3049 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
3050 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
bc7f75fa
AK		 3051
3052 /* Do not Store bad packets */
3053 rctl &= ~E1000_RCTL_SBP;
3054
3055 /* Enable Long Packet receive */
3056 if (adapter->netdev->mtu <= ETH_DATA_LEN)
3057 rctl &= ~E1000_RCTL_LPE;
3058 else
3059 rctl |= E1000_RCTL_LPE;
3060
eb7c3adb
JK		 3061 /* Some systems expect that the CRC is included in SMBUS traffic. The
3062 * hardware strips the CRC before sending to both SMBUS (BMC) and to
3063 * host memory when this is enabled
3064 */
3065 if (adapter->flags2 & FLAG2_CRC_STRIPPING)
3066 rctl |= E1000_RCTL_SECRC;
5918bd88 3067
a4f58f54
BA		 3068 /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
3069 if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) {
3070 u16 phy_data;
3071
3072 e1e_rphy(hw, PHY_REG(770, 26), &phy_data);
3073 phy_data &= 0xfff8;
3074 phy_data |= (1 << 2);
3075 e1e_wphy(hw, PHY_REG(770, 26), phy_data);
3076
3077 e1e_rphy(hw, 22, &phy_data);
3078 phy_data &= 0x0fff;
3079 phy_data |= (1 << 14);
3080 e1e_wphy(hw, 0x10, 0x2823);
3081 e1e_wphy(hw, 0x11, 0x0003);
3082 e1e_wphy(hw, 22, phy_data);
3083 }
3084
bc7f75fa
AK		 3085 /* Setup buffer sizes */
3086 rctl &= ~E1000_RCTL_SZ_4096;
3087 rctl |= E1000_RCTL_BSEX;
3088 switch (adapter->rx_buffer_len) {
bc7f75fa
AK		 3089 case 2048:
3090 default:
3091 rctl |= E1000_RCTL_SZ_2048;
3092 rctl &= ~E1000_RCTL_BSEX;
3093 break;
3094 case 4096:
3095 rctl |= E1000_RCTL_SZ_4096;
3096 break;
3097 case 8192:
3098 rctl |= E1000_RCTL_SZ_8192;
3099 break;
3100 case 16384:
3101 rctl |= E1000_RCTL_SZ_16384;
3102 break;
3103 }
3104
5f450212
BA		 3105 /* Enable Extended Status in all Receive Descriptors */
3106 rfctl = er32(RFCTL);
3107 rfctl |= E1000_RFCTL_EXTEN;
f6bd5577 3108 ew32(RFCTL, rfctl);
5f450212 3109
e921eb1a 3110 /* 82571 and greater support packet-split where the protocol
bc7f75fa
AK		 3111 * header is placed in skb->data and the packet data is
3112 * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
3113 * In the case of a non-split, skb->data is linearly filled,
3114 * followed by the page buffers. Therefore, skb->data is
3115 * sized to hold the largest protocol header.
3116 *
3117 * allocations using alloc_page take too long for regular MTU
3118 * so only enable packet split for jumbo frames
3119 *
3120 * Using pages when the page size is greater than 16k wastes
3121 * a lot of memory, since we allocate 3 pages at all times
3122 * per packet.
3123 */
bc7f75fa 3124 pages = PAGE_USE_COUNT(adapter->netdev->mtu);
79d4e908 3125 if ((pages <= 3) && (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE))
bc7f75fa 3126 adapter->rx_ps_pages = pages;
97ac8cae
BA		 3127 else
3128 adapter->rx_ps_pages = 0;
bc7f75fa
AK		 3129
3130 if (adapter->rx_ps_pages) {
90da0669
BA		 3131 u32 psrctl = 0;
3132
140a7480
AK		 3133 /* Enable Packet split descriptors */
3134 rctl |= E1000_RCTL_DTYP_PS;
bc7f75fa 3135
e5fe2541 3136 psrctl |= adapter->rx_ps_bsize0 >> E1000_PSRCTL_BSIZE0_SHIFT;
bc7f75fa
AK		 3137
3138 switch (adapter->rx_ps_pages) {
3139 case 3:
e5fe2541
BA		 3140 psrctl |= PAGE_SIZE << E1000_PSRCTL_BSIZE3_SHIFT;
3141 /* fall-through */
bc7f75fa 3142 case 2:
e5fe2541
BA		 3143 psrctl |= PAGE_SIZE << E1000_PSRCTL_BSIZE2_SHIFT;
3144 /* fall-through */
bc7f75fa 3145 case 1:
e5fe2541 3146 psrctl |= PAGE_SIZE >> E1000_PSRCTL_BSIZE1_SHIFT;
bc7f75fa
AK		 3147 break;
3148 }
3149
3150 ew32(PSRCTL, psrctl);
3151 }
3152
cf955e6c
BG		 3153 /* This is useful for sniffing bad packets. */
3154 if (adapter->netdev->features & NETIF_F_RXALL) {
3155 /* UPE and MPE will be handled by normal PROMISC logic
e921eb1a
BA		 3156 * in e1000e_set_rx_mode
3157 */
e80bd1d1
BA		 3158 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
3159 E1000_RCTL_BAM | /* RX All Bcast Pkts */
3160 E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
cf955e6c 3161
e80bd1d1
BA		 3162 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
3163 E1000_RCTL_DPF | /* Allow filtered pause */
3164 E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
cf955e6c
BG		 3165 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
3166 * and that breaks VLANs.
3167 */
3168 }
3169
bc7f75fa 3170 ew32(RCTL, rctl);
318a94d6 3171 /* just started the receive unit, no need to restart */
12d43f7d 3172 adapter->flags &= ~FLAG_RESTART_NOW;
bc7f75fa
AK		 3173}
3174
3175/**
3176 * e1000_configure_rx - Configure Receive Unit after Reset
3177 * @adapter: board private structure
3178 *
3179 * Configure the Rx unit of the MAC after a reset.
3180 **/
3181static void e1000_configure_rx(struct e1000_adapter *adapter)
3182{
3183 struct e1000_hw *hw = &adapter->hw;
3184 struct e1000_ring *rx_ring = adapter->rx_ring;
3185 u64 rdba;
3186 u32 rdlen, rctl, rxcsum, ctrl_ext;
3187
3188 if (adapter->rx_ps_pages) {
3189 /* this is a 32 byte descriptor */
3190 rdlen = rx_ring->count *
af667a29 3191 sizeof(union e1000_rx_desc_packet_split);
bc7f75fa
AK		 3192 adapter->clean_rx = e1000_clean_rx_irq_ps;
3193 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
97ac8cae 3194 } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) {
5f450212 3195 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended);
97ac8cae
BA		 3196 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
3197 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
bc7f75fa 3198 } else {
5f450212 3199 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended);
bc7f75fa
AK		 3200 adapter->clean_rx = e1000_clean_rx_irq;
3201 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
3202 }
3203
3204 /* disable receives while setting up the descriptors */
3205 rctl = er32(RCTL);
7f99ae63
BA		 3206 if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
3207 ew32(RCTL, rctl & ~E1000_RCTL_EN);
bc7f75fa 3208 e1e_flush();
1bba4386 3209 usleep_range(10000, 20000);
bc7f75fa 3210
3a3b7586 3211 if (adapter->flags2 & FLAG2_DMA_BURST) {
e921eb1a 3212 /* set the writeback threshold (only takes effect if the RDTR
3a3b7586 3213 * is set). set GRAN=1 and write back up to 0x4 worth, and
af667a29 3214 * enable prefetching of 0x20 Rx descriptors
3a3b7586
JB		 3215 * granularity = 01
3216 * wthresh = 04,
3217 * hthresh = 04,
3218 * pthresh = 0x20
3219 */
3220 ew32(RXDCTL(0), E1000_RXDCTL_DMA_BURST_ENABLE);
3221 ew32(RXDCTL(1), E1000_RXDCTL_DMA_BURST_ENABLE);
3222
e921eb1a 3223 /* override the delay timers for enabling bursting, only if
3a3b7586
JB		 3224 * the value was not set by the user via module options
3225 */
3226 if (adapter->rx_int_delay == DEFAULT_RDTR)
3227 adapter->rx_int_delay = BURST_RDTR;
3228 if (adapter->rx_abs_int_delay == DEFAULT_RADV)
3229 adapter->rx_abs_int_delay = BURST_RADV;
3230 }
3231
bc7f75fa
AK		 3232 /* set the Receive Delay Timer Register */
3233 ew32(RDTR, adapter->rx_int_delay);
3234
3235 /* irq moderation */
3236 ew32(RADV, adapter->rx_abs_int_delay);
828bac87 3237 if ((adapter->itr_setting != 0) && (adapter->itr != 0))
22a4cca2 3238 e1000e_write_itr(adapter, adapter->itr);
bc7f75fa
AK		 3239
3240 ctrl_ext = er32(CTRL_EXT);
bc7f75fa
AK		 3241 /* Auto-Mask interrupts upon ICR access */
3242 ctrl_ext |= E1000_CTRL_EXT_IAME;
3243 ew32(IAM, 0xffffffff);
3244 ew32(CTRL_EXT, ctrl_ext);
3245 e1e_flush();
3246
e921eb1a 3247 /* Setup the HW Rx Head and Tail Descriptor Pointers and
ad68076e
BA		 3248 * the Base and Length of the Rx Descriptor Ring
3249 */
bc7f75fa 3250 rdba = rx_ring->dma;
1e36052e
BA		 3251 ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
3252 ew32(RDBAH(0), (rdba >> 32));
3253 ew32(RDLEN(0), rdlen);
3254 ew32(RDH(0), 0);
3255 ew32(RDT(0), 0);
3256 rx_ring->head = adapter->hw.hw_addr + E1000_RDH(0);
3257 rx_ring->tail = adapter->hw.hw_addr + E1000_RDT(0);
bc7f75fa 3258
0845d45e
JJB		 3259 writel(0, rx_ring->head);
3260 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
3261 e1000e_update_rdt_wa(rx_ring, 0);
3262 else
3263 writel(0, rx_ring->tail);
3264
bc7f75fa
AK		 3265 /* Enable Receive Checksum Offload for TCP and UDP */
3266 rxcsum = er32(RXCSUM);
2e1706f2 3267 if (adapter->netdev->features & NETIF_F_RXCSUM)
bc7f75fa 3268 rxcsum |= E1000_RXCSUM_TUOFL;
2e1706f2 3269 else
bc7f75fa 3270 rxcsum &= ~E1000_RXCSUM_TUOFL;
bc7f75fa
AK		 3271 ew32(RXCSUM, rxcsum);
3272
3e35d991
BA		 3273 /* With jumbo frames, excessive C-state transition latencies result
3274 * in dropped transactions.
3275 */
3276 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3277 u32 lat =
3278 ((er32(PBA) & E1000_PBA_RXA_MASK) * 1024 -
3279 adapter->max_frame_size) * 8 / 1000;
3280
3281 if (adapter->flags & FLAG_IS_ICH) {
53ec5498 3282 u32 rxdctl = er32(RXDCTL(0));
6cf08d1c 3283
53ec5498 3284 ew32(RXDCTL(0), rxdctl | 0x3);
53ec5498 3285 }
3e35d991 3286
e2c65448 3287 pm_qos_update_request(&adapter->pm_qos_req, lat);
3e35d991 3288 } else {
e2c65448 3289 pm_qos_update_request(&adapter->pm_qos_req,
3e35d991 3290 PM_QOS_DEFAULT_VALUE);
97ac8cae 3291 }
bc7f75fa
AK		 3292
3293 /* Enable Receives */
3294 ew32(RCTL, rctl);
3295}
3296
3297/**
ef9b965a
JB		 3298 * e1000e_write_mc_addr_list - write multicast addresses to MTA
3299 * @netdev: network interface device structure
bc7f75fa 3300 *
ef9b965a
JB		 3301 * Writes multicast address list to the MTA hash table.
3302 * Returns: -ENOMEM on failure
3303 * 0 on no addresses written
3304 * X on writing X addresses to MTA
3305 */
3306static int e1000e_write_mc_addr_list(struct net_device *netdev)
3307{
3308 struct e1000_adapter *adapter = netdev_priv(netdev);
3309 struct e1000_hw *hw = &adapter->hw;
3310 struct netdev_hw_addr *ha;
3311 u8 *mta_list;
3312 int i;
3313
3314 if (netdev_mc_empty(netdev)) {
3315 /* nothing to program, so clear mc list */
3316 hw->mac.ops.update_mc_addr_list(hw, NULL, 0);
3317 return 0;
3318 }
3319
3320 mta_list = kzalloc(netdev_mc_count(netdev) * ETH_ALEN, GFP_ATOMIC);
3321 if (!mta_list)
3322 return -ENOMEM;
3323
3324 /* update_mc_addr_list expects a packed array of only addresses. */
3325 i = 0;
3326 netdev_for_each_mc_addr(ha, netdev)
f0ff4398 3327 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
ef9b965a
JB		 3328
3329 hw->mac.ops.update_mc_addr_list(hw, mta_list, i);
3330 kfree(mta_list);
3331
3332 return netdev_mc_count(netdev);
3333}
3334
3335/**
3336 * e1000e_write_uc_addr_list - write unicast addresses to RAR table
3337 * @netdev: network interface device structure
bc7f75fa 3338 *
ef9b965a
JB		 3339 * Writes unicast address list to the RAR table.
3340 * Returns: -ENOMEM on failure/insufficient address space
3341 * 0 on no addresses written
3342 * X on writing X addresses to the RAR table
bc7f75fa 3343 **/
ef9b965a 3344static int e1000e_write_uc_addr_list(struct net_device *netdev)
bc7f75fa 3345{
ef9b965a
JB		 3346 struct e1000_adapter *adapter = netdev_priv(netdev);
3347 struct e1000_hw *hw = &adapter->hw;
b3e5bf1f 3348 unsigned int rar_entries;
ef9b965a
JB		 3349 int count = 0;
3350
b3e5bf1f
DE		 3351 rar_entries = hw->mac.ops.rar_get_count(hw);
3352
ef9b965a
JB		 3353 /* save a rar entry for our hardware address */
3354 rar_entries--;
3355
3356 /* save a rar entry for the LAA workaround */
3357 if (adapter->flags & FLAG_RESET_OVERWRITES_LAA)
3358 rar_entries--;
3359
3360 /* return ENOMEM indicating insufficient memory for addresses */
3361 if (netdev_uc_count(netdev) > rar_entries)
3362 return -ENOMEM;
3363
3364 if (!netdev_uc_empty(netdev) && rar_entries) {
3365 struct netdev_hw_addr *ha;
3366
e921eb1a 3367 /* write the addresses in reverse order to avoid write
ef9b965a
JB		 3368 * combining
3369 */
3370 netdev_for_each_uc_addr(ha, netdev) {
b3e5bf1f
DE		 3371 int rval;
3372
ef9b965a
JB		 3373 if (!rar_entries)
3374 break;
b3e5bf1f
DE		 3375 rval = hw->mac.ops.rar_set(hw, ha->addr, rar_entries--);
3376 if (rval < 0)
3377 return -ENOMEM;
ef9b965a
JB		 3378 count++;
3379 }
3380 }
3381
3382 /* zero out the remaining RAR entries not used above */
3383 for (; rar_entries > 0; rar_entries--) {
3384 ew32(RAH(rar_entries), 0);
3385 ew32(RAL(rar_entries), 0);
3386 }
3387 e1e_flush();
3388
3389 return count;
bc7f75fa
AK		 3390}
3391
3392/**
ef9b965a 3393 * e1000e_set_rx_mode - secondary unicast, Multicast and Promiscuous mode set
bc7f75fa
AK		 3394 * @netdev: network interface device structure
3395 *
ef9b965a
JB		 3396 * The ndo_set_rx_mode entry point is called whenever the unicast or multicast
3397 * address list or the network interface flags are updated. This routine is
3398 * responsible for configuring the hardware for proper unicast, multicast,
bc7f75fa
AK		 3399 * promiscuous mode, and all-multi behavior.
3400 **/
ef9b965a 3401static void e1000e_set_rx_mode(struct net_device *netdev)
bc7f75fa
AK		 3402{
3403 struct e1000_adapter *adapter = netdev_priv(netdev);
3404 struct e1000_hw *hw = &adapter->hw;
bc7f75fa 3405 u32 rctl;
bc7f75fa 3406
63eb48f1
DE		 3407 if (pm_runtime_suspended(netdev->dev.parent))
3408 return;
3409
bc7f75fa 3410 /* Check for Promiscuous and All Multicast modes */
bc7f75fa
AK		 3411 rctl = er32(RCTL);
3412
ef9b965a
JB		 3413 /* clear the affected bits */
3414 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
3415
bc7f75fa
AK		 3416 if (netdev->flags & IFF_PROMISC) {
3417 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
86d70e53
JK		 3418 /* Do not hardware filter VLANs in promisc mode */
3419 e1000e_vlan_filter_disable(adapter);
bc7f75fa 3420 } else {
ef9b965a 3421 int count;
3d3a1676 3422
746b9f02
PM		 3423 if (netdev->flags & IFF_ALLMULTI) {
3424 rctl |= E1000_RCTL_MPE;
746b9f02 3425 } else {
e921eb1a 3426 /* Write addresses to the MTA, if the attempt fails
ef9b965a
JB		 3427 * then we should just turn on promiscuous mode so
3428 * that we can at least receive multicast traffic
3429 */
3430 count = e1000e_write_mc_addr_list(netdev);
3431 if (count < 0)
3432 rctl |= E1000_RCTL_MPE;
746b9f02 3433 }
86d70e53 3434 e1000e_vlan_filter_enable(adapter);
e921eb1a 3435 /* Write addresses to available RAR registers, if there is not
ef9b965a
JB		 3436 * sufficient space to store all the addresses then enable
3437 * unicast promiscuous mode
bc7f75fa 3438 */
ef9b965a
JB		 3439 count = e1000e_write_uc_addr_list(netdev);
3440 if (count < 0)
3441 rctl |= E1000_RCTL_UPE;
bc7f75fa 3442 }
86d70e53 3443
ef9b965a
JB		 3444 ew32(RCTL, rctl);
3445
f646968f 3446 if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
86d70e53
JK		 3447 e1000e_vlan_strip_enable(adapter);
3448 else
3449 e1000e_vlan_strip_disable(adapter);
bc7f75fa
AK		 3450}
3451
70495a50
BA		 3452static void e1000e_setup_rss_hash(struct e1000_adapter *adapter)
3453{
3454 struct e1000_hw *hw = &adapter->hw;
3455 u32 mrqc, rxcsum;
5c8d19da 3456 u32 rss_key[10];
70495a50 3457 int i;
70495a50 3458
5c8d19da 3459 netdev_rss_key_fill(rss_key, sizeof(rss_key));
70495a50 3460 for (i = 0; i < 10; i++)
5c8d19da 3461 ew32(RSSRK(i), rss_key[i]);
70495a50
BA		 3462
3463 /* Direct all traffic to queue 0 */
3464 for (i = 0; i < 32; i++)
3465 ew32(RETA(i), 0);
3466
e921eb1a 3467 /* Disable raw packet checksumming so that RSS hash is placed in
70495a50
BA		 3468 * descriptor on writeback.
3469 */
3470 rxcsum = er32(RXCSUM);
3471 rxcsum |= E1000_RXCSUM_PCSD;
3472
3473 ew32(RXCSUM, rxcsum);
3474
3475 mrqc = (E1000_MRQC_RSS_FIELD_IPV4 |
3476 E1000_MRQC_RSS_FIELD_IPV4_TCP |
3477 E1000_MRQC_RSS_FIELD_IPV6 |
3478 E1000_MRQC_RSS_FIELD_IPV6_TCP |
3479 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX);
3480
3481 ew32(MRQC, mrqc);
3482}
3483
b67e1913
BA		 3484/**
3485 * e1000e_get_base_timinca - get default SYSTIM time increment attributes
3486 * @adapter: board private structure
3487 * @timinca: pointer to returned time increment attributes
3488 *
3489 * Get attributes for incrementing the System Time Register SYSTIML/H at
3490 * the default base frequency, and set the cyclecounter shift value.
3491 **/
d89777bf 3492s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca)
b67e1913
BA		 3493{
3494 struct e1000_hw *hw = &adapter->hw;
3495 u32 incvalue, incperiod, shift;
3496
79849ebc
DE		 3497 /* Make sure clock is enabled on I217/I218/I219 before checking
3498 * the frequency
3499 */
3500 if (((hw->mac.type == e1000_pch_lpt) ||
3501 (hw->mac.type == e1000_pch_spt)) &&
b67e1913
BA		 3502 !(er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) &&
3503 !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_ENABLED)) {
3504 u32 fextnvm7 = er32(FEXTNVM7);
3505
3506 if (!(fextnvm7 & (1 << 0))) {
3507 ew32(FEXTNVM7, fextnvm7 | (1 << 0));
3508 e1e_flush();
3509 }
3510 }
3511
3512 switch (hw->mac.type) {
3513 case e1000_pch2lan:
3514 case e1000_pch_lpt:
83129b37 3515 if (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI) {
b67e1913
BA		 3516 /* Stable 96MHz frequency */
3517 incperiod = INCPERIOD_96MHz;
3518 incvalue = INCVALUE_96MHz;
3519 shift = INCVALUE_SHIFT_96MHz;
3520 adapter->cc.shift = shift + INCPERIOD_SHIFT_96MHz;
83129b37
YL		 3521 } else {
3522 /* Stable 25MHz frequency */
3523 incperiod = INCPERIOD_25MHz;
3524 incvalue = INCVALUE_25MHz;
3525 shift = INCVALUE_SHIFT_25MHz;
3526 adapter->cc.shift = shift;
3527 }
3528 break;
3529 case e1000_pch_spt:
3530 if (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI) {
3531 /* Stable 24MHz frequency */
3532 incperiod = INCPERIOD_24MHz;
3533 incvalue = INCVALUE_24MHz;
3534 shift = INCVALUE_SHIFT_24MHz;
3535 adapter->cc.shift = shift;
b67e1913
BA		 3536 break;
3537 }
83129b37 3538 return -EINVAL;
b67e1913
BA		 3539 case e1000_82574:
3540 case e1000_82583:
3541 /* Stable 25MHz frequency */
3542 incperiod = INCPERIOD_25MHz;
3543 incvalue = INCVALUE_25MHz;
3544 shift = INCVALUE_SHIFT_25MHz;
3545 adapter->cc.shift = shift;
3546 break;
3547 default:
3548 return -EINVAL;
3549 }
3550
3551 *timinca = ((incperiod << E1000_TIMINCA_INCPERIOD_SHIFT) |
3552 ((incvalue << shift) & E1000_TIMINCA_INCVALUE_MASK));
3553
3554 return 0;
3555}
3556
3557/**
3558 * e1000e_config_hwtstamp - configure the hwtstamp registers and enable/disable
3559 * @adapter: board private structure
3560 *
3561 * Outgoing time stamping can be enabled and disabled. Play nice and
3562 * disable it when requested, although it shouldn't cause any overhead
3563 * when no packet needs it. At most one packet in the queue may be
3564 * marked for time stamping, otherwise it would be impossible to tell
3565 * for sure to which packet the hardware time stamp belongs.
3566 *
3567 * Incoming time stamping has to be configured via the hardware filters.
3568 * Not all combinations are supported, in particular event type has to be
3569 * specified. Matching the kind of event packet is not supported, with the
3570 * exception of "all V2 events regardless of level 2 or 4".
3571 **/
62d7e3a2
BH		 3572static int e1000e_config_hwtstamp(struct e1000_adapter *adapter,
3573 struct hwtstamp_config *config)
b67e1913
BA		 3574{
3575 struct e1000_hw *hw = &adapter->hw;
b67e1913
BA		 3576 u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED;
3577 u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED;
d89777bf
BA		 3578 u32 rxmtrl = 0;
3579 u16 rxudp = 0;
3580 bool is_l4 = false;
3581 bool is_l2 = false;
b67e1913
BA		 3582 u32 regval;
3583 s32 ret_val;
3584
3585 if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP))
3586 return -EINVAL;
3587
3588 /* flags reserved for future extensions - must be zero */
3589 if (config->flags)
3590 return -EINVAL;
3591
3592 switch (config->tx_type) {
3593 case HWTSTAMP_TX_OFF:
3594 tsync_tx_ctl = 0;
3595 break;
3596 case HWTSTAMP_TX_ON:
3597 break;
3598 default:
3599 return -ERANGE;
3600 }
3601
3602 switch (config->rx_filter) {
3603 case HWTSTAMP_FILTER_NONE:
3604 tsync_rx_ctl = 0;
3605 break;
d89777bf
BA		 3606 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
3607 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
3608 rxmtrl = E1000_RXMTRL_PTP_V1_SYNC_MESSAGE;
3609 is_l4 = true;
3610 break;
3611 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
3612 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
3613 rxmtrl = E1000_RXMTRL_PTP_V1_DELAY_REQ_MESSAGE;
3614 is_l4 = true;
3615 break;
3616 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
3617 /* Also time stamps V2 L2 Path Delay Request/Response */
3618 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2;
3619 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE;
3620 is_l2 = true;
3621 break;
3622 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
3623 /* Also time stamps V2 L2 Path Delay Request/Response. */
3624 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2;
3625 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE;
3626 is_l2 = true;
3627 break;
3628 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
3629 /* Hardware cannot filter just V2 L4 Sync messages;
3630 * fall-through to V2 (both L2 and L4) Sync.
3631 */
3632 case HWTSTAMP_FILTER_PTP_V2_SYNC:
3633 /* Also time stamps V2 Path Delay Request/Response. */
3634 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
3635 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE;
3636 is_l2 = true;
3637 is_l4 = true;
3638 break;
3639 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
3640 /* Hardware cannot filter just V2 L4 Delay Request messages;
3641 * fall-through to V2 (both L2 and L4) Delay Request.
3642 */
3643 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
3644 /* Also time stamps V2 Path Delay Request/Response. */
3645 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
3646 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE;
3647 is_l2 = true;
3648 is_l4 = true;
3649 break;
3650 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
3651 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
3652 /* Hardware cannot filter just V2 L4 or L2 Event messages;
3653 * fall-through to all V2 (both L2 and L4) Events.
3654 */
3655 case HWTSTAMP_FILTER_PTP_V2_EVENT:
3656 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2;
3657 config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
3658 is_l2 = true;
3659 is_l4 = true;
3660 break;
3661 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
3662 /* For V1, the hardware can only filter Sync messages or
3663 * Delay Request messages but not both so fall-through to
3664 * time stamp all packets.
3665 */
b67e1913 3666 case HWTSTAMP_FILTER_ALL:
d89777bf
BA		 3667 is_l2 = true;
3668 is_l4 = true;
b67e1913
BA		 3669 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL;
3670 config->rx_filter = HWTSTAMP_FILTER_ALL;
3671 break;
3672 default:
3673 return -ERANGE;
3674 }
3675
62d7e3a2
BH		 3676 adapter->hwtstamp_config = *config;
3677
b67e1913
BA		 3678 /* enable/disable Tx h/w time stamping */
3679 regval = er32(TSYNCTXCTL);
3680 regval &= ~E1000_TSYNCTXCTL_ENABLED;
3681 regval |= tsync_tx_ctl;
3682 ew32(TSYNCTXCTL, regval);
3683 if ((er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) !=
3684 (regval & E1000_TSYNCTXCTL_ENABLED)) {
3685 e_err("Timesync Tx Control register not set as expected\n");
3686 return -EAGAIN;
3687 }
3688
3689 /* enable/disable Rx h/w time stamping */
3690 regval = er32(TSYNCRXCTL);
3691 regval &= ~(E1000_TSYNCRXCTL_ENABLED | E1000_TSYNCRXCTL_TYPE_MASK);
3692 regval |= tsync_rx_ctl;
3693 ew32(TSYNCRXCTL, regval);
3694 if ((er32(TSYNCRXCTL) & (E1000_TSYNCRXCTL_ENABLED |
3695 E1000_TSYNCRXCTL_TYPE_MASK)) !=
3696 (regval & (E1000_TSYNCRXCTL_ENABLED |
3697 E1000_TSYNCRXCTL_TYPE_MASK))) {
3698 e_err("Timesync Rx Control register not set as expected\n");
3699 return -EAGAIN;
3700 }
3701
d89777bf
BA		 3702 /* L2: define ethertype filter for time stamped packets */
3703 if (is_l2)
3704 rxmtrl |= ETH_P_1588;
3705
3706 /* define which PTP packets get time stamped */
3707 ew32(RXMTRL, rxmtrl);
3708
3709 /* Filter by destination port */
3710 if (is_l4) {
3711 rxudp = PTP_EV_PORT;
3712 cpu_to_be16s(&rxudp);
3713 }
3714 ew32(RXUDP, rxudp);
3715
3716 e1e_flush();
3717
b67e1913 3718 /* Clear TSYNCRXCTL_VALID & TSYNCTXCTL_VALID bit */
70806a7f
BA		 3719 er32(RXSTMPH);
3720 er32(TXSTMPH);
b67e1913
BA		 3721
3722 /* Get and set the System Time Register SYSTIM base frequency */
3723 ret_val = e1000e_get_base_timinca(adapter, &regval);
3724 if (ret_val)
3725 return ret_val;
3726 ew32(TIMINCA, regval);
3727
3728 /* reset the ns time counter */
3729 timecounter_init(&adapter->tc, &adapter->cc,
3730 ktime_to_ns(ktime_get_real()));
3731
3732 return 0;
3733}
3734
bc7f75fa 3735/**
ad68076e 3736 * e1000_configure - configure the hardware for Rx and Tx
bc7f75fa
AK		 3737 * @adapter: private board structure
3738 **/
3739static void e1000_configure(struct e1000_adapter *adapter)
3740{
55aa6985
BA		 3741 struct e1000_ring *rx_ring = adapter->rx_ring;
3742
ef9b965a 3743 e1000e_set_rx_mode(adapter->netdev);
bc7f75fa
AK		 3744
3745 e1000_restore_vlan(adapter);
cd791618 3746 e1000_init_manageability_pt(adapter);
bc7f75fa
AK		 3747
3748 e1000_configure_tx(adapter);
70495a50
BA		 3749
3750 if (adapter->netdev->features & NETIF_F_RXHASH)
3751 e1000e_setup_rss_hash(adapter);
bc7f75fa
AK		 3752 e1000_setup_rctl(adapter);
3753 e1000_configure_rx(adapter);
55aa6985 3754 adapter->alloc_rx_buf(rx_ring, e1000_desc_unused(rx_ring), GFP_KERNEL);
bc7f75fa
AK		 3755}
3756
3757/**
3758 * e1000e_power_up_phy - restore link in case the phy was powered down
3759 * @adapter: address of board private structure
3760 *
3761 * The phy may be powered down to save power and turn off link when the
3762 * driver is unloaded and wake on lan is not enabled (among others)
3763 * *** this routine MUST be followed by a call to e1000e_reset ***
3764 **/
3765void e1000e_power_up_phy(struct e1000_adapter *adapter)
3766{
17f208de
BA		 3767 if (adapter->hw.phy.ops.power_up)
3768 adapter->hw.phy.ops.power_up(&adapter->hw);
bc7f75fa
AK		 3769
3770 adapter->hw.mac.ops.setup_link(&adapter->hw);
3771}
3772
3773/**
3774 * e1000_power_down_phy - Power down the PHY
3775 *
17f208de
BA		 3776 * Power down the PHY so no link is implied when interface is down.
3777 * The PHY cannot be powered down if management or WoL is active.
bc7f75fa
AK		 3778 */
3779static void e1000_power_down_phy(struct e1000_adapter *adapter)
3780{
17f208de
BA		 3781 if (adapter->hw.phy.ops.power_down)
3782 adapter->hw.phy.ops.power_down(&adapter->hw);
bc7f75fa
AK		 3783}
3784
ad851fbb
YL		 3785/**
3786 * e1000_flush_tx_ring - remove all descriptors from the tx_ring
3787 *
3788 * We want to clear all pending descriptors from the TX ring.
3789 * zeroing happens when the HW reads the regs. We assign the ring itself as
3790 * the data of the next descriptor. We don't care about the data we are about
3791 * to reset the HW.
3792 */
3793static void e1000_flush_tx_ring(struct e1000_adapter *adapter)
3794{
3795 struct e1000_hw *hw = &adapter->hw;
3796 struct e1000_ring *tx_ring = adapter->tx_ring;
3797 struct e1000_tx_desc *tx_desc = NULL;
3798 u32 tdt, tctl, txd_lower = E1000_TXD_CMD_IFCS;
3799 u16 size = 512;
3800
3801 tctl = er32(TCTL);
3802 ew32(TCTL, tctl | E1000_TCTL_EN);
3803 tdt = er32(TDT(0));
3804 BUG_ON(tdt != tx_ring->next_to_use);
3805 tx_desc = E1000_TX_DESC(*tx_ring, tx_ring->next_to_use);
3806 tx_desc->buffer_addr = tx_ring->dma;
3807
3808 tx_desc->lower.data = cpu_to_le32(txd_lower | size);
3809 tx_desc->upper.data = 0;
3810 /* flush descriptors to memory before notifying the HW */
3811 wmb();
3812 tx_ring->next_to_use++;
3813 if (tx_ring->next_to_use == tx_ring->count)
3814 tx_ring->next_to_use = 0;
3815 ew32(TDT(0), tx_ring->next_to_use);
3816 mmiowb();
3817 usleep_range(200, 250);
3818}
3819
3820/**
3821 * e1000_flush_rx_ring - remove all descriptors from the rx_ring
3822 *
3823 * Mark all descriptors in the RX ring as consumed and disable the rx ring
3824 */
3825static void e1000_flush_rx_ring(struct e1000_adapter *adapter)
3826{
3827 u32 rctl, rxdctl;
3828 struct e1000_hw *hw = &adapter->hw;
3829
3830 rctl = er32(RCTL);
3831 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3832 e1e_flush();
3833 usleep_range(100, 150);
3834
3835 rxdctl = er32(RXDCTL(0));
3836 /* zero the lower 14 bits (prefetch and host thresholds) */
3837 rxdctl &= 0xffffc000;
3838
3839 /* update thresholds: prefetch threshold to 31, host threshold to 1
3840 * and make sure the granularity is "descriptors" and not "cache lines"
3841 */
3842 rxdctl |= (0x1F | (1 << 8) | E1000_RXDCTL_THRESH_UNIT_DESC);
3843
3844 ew32(RXDCTL(0), rxdctl);
3845 /* momentarily enable the RX ring for the changes to take effect */
3846 ew32(RCTL, rctl | E1000_RCTL_EN);
3847 e1e_flush();
3848 usleep_range(100, 150);
3849 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3850}
3851
3852/**
3853 * e1000_flush_desc_rings - remove all descriptors from the descriptor rings
3854 *
3855 * In i219, the descriptor rings must be emptied before resetting the HW
3856 * or before changing the device state to D3 during runtime (runtime PM).
3857 *
3858 * Failure to do this will cause the HW to enter a unit hang state which can
3859 * only be released by PCI reset on the device
3860 *
3861 */
3862
3863static void e1000_flush_desc_rings(struct e1000_adapter *adapter)
3864{
ff917429 3865 u16 hang_state;
ad851fbb
YL		 3866 u32 fext_nvm11, tdlen;
3867 struct e1000_hw *hw = &adapter->hw;
3868
3869 /* First, disable MULR fix in FEXTNVM11 */
3870 fext_nvm11 = er32(FEXTNVM11);
3871 fext_nvm11 |= E1000_FEXTNVM11_DISABLE_MULR_FIX;
3872 ew32(FEXTNVM11, fext_nvm11);
3873 /* do nothing if we're not in faulty state, or if the queue is empty */
3874 tdlen = er32(TDLEN(0));
ff917429
YL		 3875 pci_read_config_word(adapter->pdev, PCICFG_DESC_RING_STATUS,
3876 &hang_state);
3877 if (!(hang_state & FLUSH_DESC_REQUIRED) || !tdlen)
ad851fbb
YL		 3878 return;
3879 e1000_flush_tx_ring(adapter);
3880 /* recheck, maybe the fault is caused by the rx ring */
ff917429
YL		 3881 pci_read_config_word(adapter->pdev, PCICFG_DESC_RING_STATUS,
3882 &hang_state);
3883 if (hang_state & FLUSH_DESC_REQUIRED)
ad851fbb
YL		 3884 e1000_flush_rx_ring(adapter);
3885}
3886
bc7f75fa
AK		 3887/**
3888 * e1000e_reset - bring the hardware into a known good state
3889 *
3890 * This function boots the hardware and enables some settings that
3891 * require a configuration cycle of the hardware - those cannot be
3892 * set/changed during runtime. After reset the device needs to be
ad68076e 3893 * properly configured for Rx, Tx etc.
bc7f75fa
AK		 3894 */
3895void e1000e_reset(struct e1000_adapter *adapter)
3896{
3897 struct e1000_mac_info *mac = &adapter->hw.mac;
318a94d6 3898 struct e1000_fc_info *fc = &adapter->hw.fc;
bc7f75fa
AK		 3899 struct e1000_hw *hw = &adapter->hw;
3900 u32 tx_space, min_tx_space, min_rx_space;
318a94d6 3901 u32 pba = adapter->pba;
bc7f75fa
AK		 3902 u16 hwm;
3903
ad68076e 3904 /* reset Packet Buffer Allocation to default */
318a94d6 3905 ew32(PBA, pba);
df762464 3906
8084b86d 3907 if (adapter->max_frame_size > (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)) {
e921eb1a 3908 /* To maintain wire speed transmits, the Tx FIFO should be
bc7f75fa
AK		 3909 * large enough to accommodate two full transmit packets,
3910 * rounded up to the next 1KB and expressed in KB. Likewise,
3911 * the Rx FIFO should be large enough to accommodate at least
3912 * one full receive packet and is similarly rounded up and
ad68076e
BA		 3913 * expressed in KB.
3914 */
df762464 3915 pba = er32(PBA);
bc7f75fa 3916 /* upper 16 bits has Tx packet buffer allocation size in KB */
df762464 3917 tx_space = pba >> 16;
bc7f75fa 3918 /* lower 16 bits has Rx packet buffer allocation size in KB */
df762464 3919 pba &= 0xffff;
e921eb1a 3920 /* the Tx fifo also stores 16 bytes of information about the Tx
ad68076e 3921 * but don't include ethernet FCS because hardware appends it
318a94d6
JK		 3922 */
3923 min_tx_space = (adapter->max_frame_size +
e5fe2541 3924 sizeof(struct e1000_tx_desc) - ETH_FCS_LEN) * 2;
bc7f75fa
AK		 3925 min_tx_space = ALIGN(min_tx_space, 1024);
3926 min_tx_space >>= 10;
3927 /* software strips receive CRC, so leave room for it */
318a94d6 3928 min_rx_space = adapter->max_frame_size;
bc7f75fa
AK		 3929 min_rx_space = ALIGN(min_rx_space, 1024);
3930 min_rx_space >>= 10;
3931
e921eb1a 3932 /* If current Tx allocation is less than the min Tx FIFO size,
bc7f75fa 3933 * and the min Tx FIFO size is less than the current Rx FIFO
ad68076e
BA		 3934 * allocation, take space away from current Rx allocation
3935 */
df762464
AK		 3936 if ((tx_space < min_tx_space) &&
3937 ((min_tx_space - tx_space) < pba)) {
3938 pba -= min_tx_space - tx_space;
bc7f75fa 3939
e921eb1a 3940 /* if short on Rx space, Rx wins and must trump Tx
419e551c 3941 * adjustment
ad68076e 3942 */
79d4e908 3943 if (pba < min_rx_space)
df762464 3944 pba = min_rx_space;
bc7f75fa 3945 }
df762464
AK		 3946
3947 ew32(PBA, pba);
bc7f75fa
AK		 3948 }
3949
e921eb1a 3950 /* flow control settings
ad68076e 3951 *
38eb394e 3952 * The high water mark must be low enough to fit one full frame
bc7f75fa
AK		 3953 * (or the size used for early receive) above it in the Rx FIFO.
3954 * Set it to the lower of:
3955 * - 90% of the Rx FIFO size, and
38eb394e 3956 * - the full Rx FIFO size minus one full frame
ad68076e 3957 */
d3738bb8
BA		 3958 if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME)
3959 fc->pause_time = 0xFFFF;
3960 else
3961 fc->pause_time = E1000_FC_PAUSE_TIME;
b20caa80 3962 fc->send_xon = true;
d3738bb8
BA		 3963 fc->current_mode = fc->requested_mode;
3964
3965 switch (hw->mac.type) {
79d4e908
BA		 3966 case e1000_ich9lan:
3967 case e1000_ich10lan:
3968 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3969 pba = 14;
3970 ew32(PBA, pba);
3971 fc->high_water = 0x2800;
3972 fc->low_water = fc->high_water - 8;
3973 break;
3974 }
3975 /* fall-through */
d3738bb8 3976 default:
79d4e908
BA		 3977 hwm = min(((pba << 10) * 9 / 10),
3978 ((pba << 10) - adapter->max_frame_size));
d3738bb8 3979
e80bd1d1 3980 fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */
d3738bb8
BA		 3981 fc->low_water = fc->high_water - 8;
3982 break;
3983 case e1000_pchlan:
e921eb1a 3984 /* Workaround PCH LOM adapter hangs with certain network
38eb394e
BA		 3985 * loads. If hangs persist, try disabling Tx flow control.
3986 */
3987 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3988 fc->high_water = 0x3500;
e80bd1d1 3989 fc->low_water = 0x1500;
38eb394e
BA		 3990 } else {
3991 fc->high_water = 0x5000;
e80bd1d1 3992 fc->low_water = 0x3000;
38eb394e 3993 }
a305595b 3994 fc->refresh_time = 0x1000;
d3738bb8
BA		 3995 break;
3996 case e1000_pch2lan:
2fbe4526 3997 case e1000_pch_lpt:
79849ebc 3998 case e1000_pch_spt:
d3738bb8 3999 fc->refresh_time = 0x0400;
347b5201
BA		 4000
4001 if (adapter->netdev->mtu <= ETH_DATA_LEN) {
4002 fc->high_water = 0x05C20;
4003 fc->low_water = 0x05048;
4004 fc->pause_time = 0x0650;
4005 break;
828bac87 4006 }
347b5201 4007
ce345e08
BA		 4008 pba = 14;
4009 ew32(PBA, pba);
347b5201
BA		 4010 fc->high_water = ((pba << 10) * 9 / 10) & E1000_FCRTH_RTH;
4011 fc->low_water = ((pba << 10) * 8 / 10) & E1000_FCRTL_RTL;
d3738bb8 4012 break;
38eb394e 4013 }
bc7f75fa 4014
e921eb1a 4015 /* Alignment of Tx data is on an arbitrary byte boundary with the
d821a4c4
BA		 4016 * maximum size per Tx descriptor limited only to the transmit
4017 * allocation of the packet buffer minus 96 bytes with an upper
4018 * limit of 24KB due to receive synchronization limitations.
4019 */
4020 adapter->tx_fifo_limit = min_t(u32, ((er32(PBA) >> 16) << 10) - 96,
4021 24 << 10);
4022
e921eb1a 4023 /* Disable Adaptive Interrupt Moderation if 2 full packets cannot
79d4e908 4024 * fit in receive buffer.
828bac87
BA		 4025 */
4026 if (adapter->itr_setting & 0x3) {
79d4e908 4027 if ((adapter->max_frame_size * 2) > (pba << 10)) {
828bac87
BA		 4028 if (!(adapter->flags2 & FLAG2_DISABLE_AIM)) {
4029 dev_info(&adapter->pdev->dev,
17e813ec 4030 "Interrupt Throttle Rate off\n");
828bac87 4031 adapter->flags2 |= FLAG2_DISABLE_AIM;
22a4cca2 4032 e1000e_write_itr(adapter, 0);
828bac87
BA		 4033 }
4034 } else if (adapter->flags2 & FLAG2_DISABLE_AIM) {
4035 dev_info(&adapter->pdev->dev,
17e813ec 4036 "Interrupt Throttle Rate on\n");
828bac87
BA		 4037 adapter->flags2 &= ~FLAG2_DISABLE_AIM;
4038 adapter->itr = 20000;
22a4cca2 4039 e1000e_write_itr(adapter, adapter->itr);
828bac87
BA		 4040 }
4041 }
4042
0ffc5646
YL		 4043 if (hw->mac.type == e1000_pch_spt)
4044 e1000_flush_desc_rings(adapter);
bc7f75fa
AK		 4045 /* Allow time for pending master requests to run */
4046 mac->ops.reset_hw(hw);
97ac8cae 4047
e921eb1a 4048 /* For parts with AMT enabled, let the firmware know
97ac8cae
BA		 4049 * that the network interface is in control
4050 */
c43bc57e 4051 if (adapter->flags & FLAG_HAS_AMT)
31dbe5b4 4052 e1000e_get_hw_control(adapter);
97ac8cae 4053
bc7f75fa
AK		 4054 ew32(WUC, 0);
4055
4056 if (mac->ops.init_hw(hw))
44defeb3 4057 e_err("Hardware Error\n");
bc7f75fa
AK		 4058
4059 e1000_update_mng_vlan(adapter);
4060
4061 /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
4062 ew32(VET, ETH_P_8021Q);
4063
4064 e1000e_reset_adaptive(hw);
31dbe5b4 4065
b67e1913 4066 /* initialize systim and reset the ns time counter */
62d7e3a2 4067 e1000e_config_hwtstamp(adapter, &adapter->hwtstamp_config);
b67e1913 4068
d495bcb8
BA		 4069 /* Set EEE advertisement as appropriate */
4070 if (adapter->flags2 & FLAG2_HAS_EEE) {
4071 s32 ret_val;
4072 u16 adv_addr;
4073
4074 switch (hw->phy.type) {
4075 case e1000_phy_82579:
4076 adv_addr = I82579_EEE_ADVERTISEMENT;
4077 break;
4078 case e1000_phy_i217:
4079 adv_addr = I217_EEE_ADVERTISEMENT;
4080 break;
4081 default:
4082 dev_err(&adapter->pdev->dev,
4083 "Invalid PHY type setting EEE advertisement\n");
4084 return;
4085 }
4086
4087 ret_val = hw->phy.ops.acquire(hw);
4088 if (ret_val) {
4089 dev_err(&adapter->pdev->dev,
4090 "EEE advertisement - unable to acquire PHY\n");
4091 return;
4092 }
4093
4094 e1000_write_emi_reg_locked(hw, adv_addr,
4095 hw->dev_spec.ich8lan.eee_disable ?
4096 0 : adapter->eee_advert);
4097
4098 hw->phy.ops.release(hw);
4099 }
4100
31dbe5b4 4101 if (!netif_running(adapter->netdev) &&
28002099 4102 !test_bit(__E1000_TESTING, &adapter->state))
31dbe5b4 4103 e1000_power_down_phy(adapter);
31dbe5b4 4104
bc7f75fa
AK		 4105 e1000_get_phy_info(hw);
4106
918d7197
BA		 4107 if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) &&
4108 !(adapter->flags & FLAG_SMART_POWER_DOWN)) {
bc7f75fa 4109 u16 phy_data = 0;
e921eb1a 4110 /* speed up time to link by disabling smart power down, ignore
bc7f75fa 4111 * the return value of this function because there is nothing
ad68076e
BA		 4112 * different we would do if it failed
4113 */
bc7f75fa
AK		 4114 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data);
4115 phy_data &= ~IGP02E1000_PM_SPD;
4116 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
4117 }
ec945cfb
YL		 4118 if (hw->mac.type == e1000_pch_spt && adapter->int_mode == 0) {
4119 u32 reg;
4120
4121 /* Fextnvm7 @ 0xe4[2] = 1 */
4122 reg = er32(FEXTNVM7);
4123 reg |= E1000_FEXTNVM7_SIDE_CLK_UNGATE;
4124 ew32(FEXTNVM7, reg);
4125 /* Fextnvm9 @ 0x5bb4[13:12] = 11 */
4126 reg = er32(FEXTNVM9);
4127 reg |= E1000_FEXTNVM9_IOSFSB_CLKGATE_DIS |
4128 E1000_FEXTNVM9_IOSFSB_CLKREQ_DIS;
4129 ew32(FEXTNVM9, reg);
4130 }
4131
bc7f75fa
AK		 4132}
4133
a61cfe4f
BP		 4134/**
4135 * e1000e_trigger_lsc - trigger an LSC interrupt
4136 * @adapter:
4137 *
4138 * Fire a link status change interrupt to start the watchdog.
4139 **/
4140static void e1000e_trigger_lsc(struct e1000_adapter *adapter)
bc7f75fa
AK		 4141{
4142 struct e1000_hw *hw = &adapter->hw;
4143
a61cfe4f
BP		 4144 if (adapter->msix_entries)
4145 ew32(ICS, E1000_ICS_OTHER);
4146 else
4147 ew32(ICS, E1000_ICS_LSC);
4148}
4149
4150void e1000e_up(struct e1000_adapter *adapter)
4151{
bc7f75fa
AK		 4152 /* hardware has been reset, we need to reload some things */
4153 e1000_configure(adapter);
4154
4155 clear_bit(__E1000_DOWN, &adapter->state);
4156
4662e82b
BA		 4157 if (adapter->msix_entries)
4158 e1000_configure_msix(adapter);
bc7f75fa
AK		 4159 e1000_irq_enable(adapter);
4160
400484fa 4161 netif_start_queue(adapter->netdev);
4cb9be7a 4162
a61cfe4f 4163 e1000e_trigger_lsc(adapter);
bc7f75fa
AK		 4164}
4165
713b3c9e
JB		 4166static void e1000e_flush_descriptors(struct e1000_adapter *adapter)
4167{
4168 struct e1000_hw *hw = &adapter->hw;
4169
4170 if (!(adapter->flags2 & FLAG2_DMA_BURST))
4171 return;
4172
4173 /* flush pending descriptor writebacks to memory */
4174 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
4175 ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD);
4176
4177 /* execute the writes immediately */
4178 e1e_flush();
bf03085f 4179
e921eb1a 4180 /* due to rare timing issues, write to TIDV/RDTR again to ensure the
bf03085f
MV		 4181 * write is successful
4182 */
4183 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
4184 ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD);
713b3c9e
JB		 4185
4186 /* execute the writes immediately */
4187 e1e_flush();
4188}
4189
67fd4fcb
JK		 4190static void e1000e_update_stats(struct e1000_adapter *adapter);
4191
28002099
DE		 4192/**
4193 * e1000e_down - quiesce the device and optionally reset the hardware
4194 * @adapter: board private structure
4195 * @reset: boolean flag to reset the hardware or not
4196 */
4197void e1000e_down(struct e1000_adapter *adapter, bool reset)
bc7f75fa
AK		 4198{
4199 struct net_device *netdev = adapter->netdev;
4200 struct e1000_hw *hw = &adapter->hw;
4201 u32 tctl, rctl;
4202
e921eb1a 4203 /* signal that we're down so the interrupt handler does not
ad68076e
BA		 4204 * reschedule our watchdog timer
4205 */
bc7f75fa
AK		 4206 set_bit(__E1000_DOWN, &adapter->state);
4207
a60a132e
ET		 4208 netif_carrier_off(netdev);
4209
bc7f75fa
AK		 4210 /* disable receives in the hardware */
4211 rctl = er32(RCTL);
7f99ae63
BA		 4212 if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
4213 ew32(RCTL, rctl & ~E1000_RCTL_EN);
bc7f75fa
AK		 4214 /* flush and sleep below */
4215
4cb9be7a 4216 netif_stop_queue(netdev);
bc7f75fa
AK		 4217
4218 /* disable transmits in the hardware */
4219 tctl = er32(TCTL);
4220 tctl &= ~E1000_TCTL_EN;
4221 ew32(TCTL, tctl);
7f99ae63 4222
bc7f75fa
AK		 4223 /* flush both disables and wait for them to finish */
4224 e1e_flush();
1bba4386 4225 usleep_range(10000, 20000);
bc7f75fa 4226
bc7f75fa
AK		 4227 e1000_irq_disable(adapter);
4228
a3b87a4c
BA		 4229 napi_synchronize(&adapter->napi);
4230
bc7f75fa
AK		 4231 del_timer_sync(&adapter->watchdog_timer);
4232 del_timer_sync(&adapter->phy_info_timer);
4233
67fd4fcb
JK		 4234 spin_lock(&adapter->stats64_lock);
4235 e1000e_update_stats(adapter);
4236 spin_unlock(&adapter->stats64_lock);
4237
400484fa 4238 e1000e_flush_descriptors(adapter);
400484fa 4239
bc7f75fa
AK		 4240 adapter->link_speed = 0;
4241 adapter->link_duplex = 0;
4242
da1e2046
BA		 4243 /* Disable Si errata workaround on PCHx for jumbo frame flow */
4244 if ((hw->mac.type >= e1000_pch2lan) &&
4245 (adapter->netdev->mtu > ETH_DATA_LEN) &&
4246 e1000_lv_jumbo_workaround_ich8lan(hw, false))
4247 e_dbg("failed to disable jumbo frame workaround mode\n");
4248
0ffc5646
YL		 4249 if (!pci_channel_offline(adapter->pdev)) {
4250 if (reset)
4251 e1000e_reset(adapter);
4252 else if (hw->mac.type == e1000_pch_spt)
4253 e1000_flush_desc_rings(adapter);
4254 }
4255 e1000_clean_tx_ring(adapter->tx_ring);
4256 e1000_clean_rx_ring(adapter->rx_ring);
bc7f75fa
AK		 4257}
4258
4259void e1000e_reinit_locked(struct e1000_adapter *adapter)
4260{
4261 might_sleep();
4262 while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
1bba4386 4263 usleep_range(1000, 2000);
28002099 4264 e1000e_down(adapter, true);
bc7f75fa
AK		 4265 e1000e_up(adapter);
4266 clear_bit(__E1000_RESETTING, &adapter->state);
4267}
4268
b67e1913
BA		 4269/**
4270 * e1000e_cyclecounter_read - read raw cycle counter (used by time counter)
4271 * @cc: cyclecounter structure
4272 **/
4273static cycle_t e1000e_cyclecounter_read(const struct cyclecounter *cc)
4274{
4275 struct e1000_adapter *adapter = container_of(cc, struct e1000_adapter,
4276 cc);
4277 struct e1000_hw *hw = &adapter->hw;
37b12910 4278 u32 systimel_1, systimel_2, systimeh;
5e7ff970 4279 cycle_t systim, systim_next;
37b12910
RA		 4280 /* SYSTIMH latching upon SYSTIML read does not work well.
4281 * This means that if SYSTIML overflows after we read it but before
4282 * we read SYSTIMH, the value of SYSTIMH has been incremented and we
4283 * will experience a huge non linear increment in the systime value
4284 * to fix that we test for overflow and if true, we re-read systime.
83129b37 4285 */
37b12910
RA		 4286 systimel_1 = er32(SYSTIML);
4287 systimeh = er32(SYSTIMH);
4288 systimel_2 = er32(SYSTIML);
4289 /* Check for overflow. If there was no overflow, use the values */
4290 if (systimel_1 < systimel_2) {
4291 systim = (cycle_t)systimel_1;
4292 systim |= (cycle_t)systimeh << 32;
4293 } else {
4294 /* There was an overflow, read again SYSTIMH, and use
4295 * systimel_2
4296 */
4297 systimeh = er32(SYSTIMH);
4298 systim = (cycle_t)systimel_2;
4299 systim |= (cycle_t)systimeh << 32;
4300 }
b67e1913 4301
5e7ff970
TF		 4302 if ((hw->mac.type == e1000_82574) || (hw->mac.type == e1000_82583)) {
4303 u64 incvalue, time_delta, rem, temp;
4304 int i;
4305
4306 /* errata for 82574/82583 possible bad bits read from SYSTIMH/L
4307 * check to see that the time is incrementing at a reasonable
4308 * rate and is a multiple of incvalue
4309 */
4310 incvalue = er32(TIMINCA) & E1000_TIMINCA_INCVALUE_MASK;
4311 for (i = 0; i < E1000_MAX_82574_SYSTIM_REREADS; i++) {
4312 /* latch SYSTIMH on read of SYSTIML */
4313 systim_next = (cycle_t)er32(SYSTIML);
4314 systim_next |= (cycle_t)er32(SYSTIMH) << 32;
4315
4316 time_delta = systim_next - systim;
4317 temp = time_delta;
4318 rem = do_div(temp, incvalue);
4319
4320 systim = systim_next;
4321
4322 if ((time_delta < E1000_82574_SYSTIM_EPSILON) &&
4323 (rem == 0))
4324 break;
4325 }
4326 }
b67e1913
BA		 4327 return systim;
4328}
4329
bc7f75fa
AK		 4330/**
4331 * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
4332 * @adapter: board private structure to initialize
4333 *
4334 * e1000_sw_init initializes the Adapter private data structure.
4335 * Fields are initialized based on PCI device information and
4336 * OS network device settings (MTU size).
4337 **/
9f9a12f8 4338static int e1000_sw_init(struct e1000_adapter *adapter)
bc7f75fa 4339{
bc7f75fa
AK		 4340 struct net_device *netdev = adapter->netdev;
4341
8084b86d 4342 adapter->rx_buffer_len = VLAN_ETH_FRAME_LEN + ETH_FCS_LEN;
bc7f75fa 4343 adapter->rx_ps_bsize0 = 128;
8084b86d 4344 adapter->max_frame_size = netdev->mtu + VLAN_ETH_HLEN + ETH_FCS_LEN;
318a94d6 4345 adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
55aa6985
BA		 4346 adapter->tx_ring_count = E1000_DEFAULT_TXD;
4347 adapter->rx_ring_count = E1000_DEFAULT_RXD;
bc7f75fa 4348
67fd4fcb
JK		 4349 spin_lock_init(&adapter->stats64_lock);
4350
4662e82b 4351 e1000e_set_interrupt_capability(adapter);
bc7f75fa 4352
4662e82b
BA		 4353 if (e1000_alloc_queues(adapter))
4354 return -ENOMEM;
bc7f75fa 4355
b67e1913
BA		 4356 /* Setup hardware time stamping cyclecounter */
4357 if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) {
4358 adapter->cc.read = e1000e_cyclecounter_read;
4d045b4c 4359 adapter->cc.mask = CYCLECOUNTER_MASK(64);
b67e1913
BA		 4360 adapter->cc.mult = 1;
4361 /* cc.shift set in e1000e_get_base_tininca() */
4362
4363 spin_lock_init(&adapter->systim_lock);
4364 INIT_WORK(&adapter->tx_hwtstamp_work, e1000e_tx_hwtstamp_work);
4365 }
4366
bc7f75fa 4367 /* Explicitly disable IRQ since the NIC can be in any state. */
bc7f75fa
AK		 4368 e1000_irq_disable(adapter);
4369
bc7f75fa
AK		 4370 set_bit(__E1000_DOWN, &adapter->state);
4371 return 0;
bc7f75fa
AK		 4372}
4373
f8d59f78
BA		 4374/**
4375 * e1000_intr_msi_test - Interrupt Handler
4376 * @irq: interrupt number
4377 * @data: pointer to a network interface device structure
4378 **/
8bb62869 4379static irqreturn_t e1000_intr_msi_test(int __always_unused irq, void *data)
f8d59f78
BA		 4380{
4381 struct net_device *netdev = data;
4382 struct e1000_adapter *adapter = netdev_priv(netdev);
4383 struct e1000_hw *hw = &adapter->hw;
4384 u32 icr = er32(ICR);
4385
3bb99fe2 4386 e_dbg("icr is %08X\n", icr);
f8d59f78
BA		 4387 if (icr & E1000_ICR_RXSEQ) {
4388 adapter->flags &= ~FLAG_MSI_TEST_FAILED;
e921eb1a 4389 /* Force memory writes to complete before acknowledging the
bc76329d
BA		 4390 * interrupt is handled.
4391 */
f8d59f78
BA		 4392 wmb();
4393 }
4394
4395 return IRQ_HANDLED;
4396}
4397
4398/**
4399 * e1000_test_msi_interrupt - Returns 0 for successful test
4400 * @adapter: board private struct
4401 *
4402 * code flow taken from tg3.c
4403 **/
4404static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
4405{
4406 struct net_device *netdev = adapter->netdev;
4407 struct e1000_hw *hw = &adapter->hw;
4408 int err;
4409
4410 /* poll_enable hasn't been called yet, so don't need disable */
4411 /* clear any pending events */
4412 er32(ICR);
4413
4414 /* free the real vector and request a test handler */
4415 e1000_free_irq(adapter);
4662e82b 4416 e1000e_reset_interrupt_capability(adapter);
f8d59f78
BA		 4417
4418 /* Assume that the test fails, if it succeeds then the test
e921eb1a
BA		 4419 * MSI irq handler will unset this flag
4420 */
f8d59f78
BA		 4421 adapter->flags |= FLAG_MSI_TEST_FAILED;
4422
4423 err = pci_enable_msi(adapter->pdev);
4424 if (err)
4425 goto msi_test_failed;
4426
a0607fd3 4427 err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0,
f8d59f78
BA		 4428 netdev->name, netdev);
4429 if (err) {
4430 pci_disable_msi(adapter->pdev);
4431 goto msi_test_failed;
4432 }
4433
e921eb1a 4434 /* Force memory writes to complete before enabling and firing an
bc76329d
BA		 4435 * interrupt.
4436 */
f8d59f78
BA		 4437 wmb();
4438
4439 e1000_irq_enable(adapter);
4440
4441 /* fire an unusual interrupt on the test handler */
4442 ew32(ICS, E1000_ICS_RXSEQ);
4443 e1e_flush();
569a3aff 4444 msleep(100);
f8d59f78
BA		 4445
4446 e1000_irq_disable(adapter);
4447
bc76329d 4448 rmb(); /* read flags after interrupt has been fired */
f8d59f78
BA		 4449
4450 if (adapter->flags & FLAG_MSI_TEST_FAILED) {
4662e82b 4451 adapter->int_mode = E1000E_INT_MODE_LEGACY;
068e8a30 4452 e_info("MSI interrupt test failed, using legacy interrupt.\n");
24b706b2 4453 } else {
068e8a30 4454 e_dbg("MSI interrupt test succeeded!\n");
24b706b2 4455 }
f8d59f78
BA		 4456
4457 free_irq(adapter->pdev->irq, netdev);
4458 pci_disable_msi(adapter->pdev);
4459
f8d59f78 4460msi_test_failed:
4662e82b 4461 e1000e_set_interrupt_capability(adapter);
068e8a30 4462 return e1000_request_irq(adapter);
f8d59f78
BA		 4463}
4464
4465/**
4466 * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
4467 * @adapter: board private struct
4468 *
4469 * code flow taken from tg3.c, called with e1000 interrupts disabled.
4470 **/
4471static int e1000_test_msi(struct e1000_adapter *adapter)
4472{
4473 int err;
4474 u16 pci_cmd;
4475
4476 if (!(adapter->flags & FLAG_MSI_ENABLED))
4477 return 0;
4478
4479 /* disable SERR in case the MSI write causes a master abort */
4480 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
36f2407f
DN		 4481 if (pci_cmd & PCI_COMMAND_SERR)
4482 pci_write_config_word(adapter->pdev, PCI_COMMAND,
4483 pci_cmd & ~PCI_COMMAND_SERR);
f8d59f78
BA		 4484
4485 err = e1000_test_msi_interrupt(adapter);
4486
36f2407f
DN		 4487 /* re-enable SERR */
4488 if (pci_cmd & PCI_COMMAND_SERR) {
4489 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
4490 pci_cmd |= PCI_COMMAND_SERR;
4491 pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
4492 }
f8d59f78 4493
f8d59f78
BA		 4494 return err;
4495}
4496
bc7f75fa 4497/**
d5ea45da 4498 * e1000e_open - Called when a network interface is made active
bc7f75fa
AK		 4499 * @netdev: network interface device structure
4500 *
4501 * Returns 0 on success, negative value on failure
4502 *
4503 * The open entry point is called when a network interface is made
4504 * active by the system (IFF_UP). At this point all resources needed
4505 * for transmit and receive operations are allocated, the interrupt
4506 * handler is registered with the OS, the watchdog timer is started,
4507 * and the stack is notified that the interface is ready.
4508 **/
d5ea45da 4509int e1000e_open(struct net_device *netdev)
bc7f75fa
AK		 4510{
4511 struct e1000_adapter *adapter = netdev_priv(netdev);
4512 struct e1000_hw *hw = &adapter->hw;
23606cf5 4513 struct pci_dev *pdev = adapter->pdev;
bc7f75fa
AK		 4514 int err;
4515
4516 /* disallow open during test */
4517 if (test_bit(__E1000_TESTING, &adapter->state))
4518 return -EBUSY;
4519
23606cf5
RW		 4520 pm_runtime_get_sync(&pdev->dev);
4521
9c563d20
JB		 4522 netif_carrier_off(netdev);
4523
bc7f75fa 4524 /* allocate transmit descriptors */
55aa6985 4525 err = e1000e_setup_tx_resources(adapter->tx_ring);
bc7f75fa
AK		 4526 if (err)
4527 goto err_setup_tx;
4528
4529 /* allocate receive descriptors */
55aa6985 4530 err = e1000e_setup_rx_resources(adapter->rx_ring);
bc7f75fa
AK		 4531 if (err)
4532 goto err_setup_rx;
4533
e921eb1a 4534 /* If AMT is enabled, let the firmware know that the network
11b08be8
BA		 4535 * interface is now open and reset the part to a known state.
4536 */
4537 if (adapter->flags & FLAG_HAS_AMT) {
31dbe5b4 4538 e1000e_get_hw_control(adapter);
11b08be8
BA		 4539 e1000e_reset(adapter);
4540 }
4541
bc7f75fa
AK		 4542 e1000e_power_up_phy(adapter);
4543
4544 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
e5fe2541 4545 if ((adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
bc7f75fa
AK		 4546 e1000_update_mng_vlan(adapter);
4547
79d4e908 4548 /* DMA latency requirement to workaround jumbo issue */
e2c65448 4549 pm_qos_add_request(&adapter->pm_qos_req, PM_QOS_CPU_DMA_LATENCY,
3e35d991 4550 PM_QOS_DEFAULT_VALUE);
c128ec29 4551
e921eb1a 4552 /* before we allocate an interrupt, we must be ready to handle it.
bc7f75fa
AK		 4553 * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
4554 * as soon as we call pci_request_irq, so we have to setup our
ad68076e
BA		 4555 * clean_rx handler before we do so.
4556 */
bc7f75fa
AK		 4557 e1000_configure(adapter);
4558
4559 err = e1000_request_irq(adapter);
4560 if (err)
4561 goto err_req_irq;
4562
e921eb1a 4563 /* Work around PCIe errata with MSI interrupts causing some chipsets to
f8d59f78
BA		 4564 * ignore e1000e MSI messages, which means we need to test our MSI
4565 * interrupt now
4566 */
4662e82b 4567 if (adapter->int_mode != E1000E_INT_MODE_LEGACY) {
f8d59f78
BA		 4568 err = e1000_test_msi(adapter);
4569 if (err) {
4570 e_err("Interrupt allocation failed\n");
4571 goto err_req_irq;
4572 }
4573 }
4574
bc7f75fa
AK		 4575 /* From here on the code is the same as e1000e_up() */
4576 clear_bit(__E1000_DOWN, &adapter->state);
4577
4578 napi_enable(&adapter->napi);
4579
4580 e1000_irq_enable(adapter);
4581
09357b00 4582 adapter->tx_hang_recheck = false;
4cb9be7a 4583 netif_start_queue(netdev);
d55b53ff 4584
66148bab 4585 hw->mac.get_link_status = true;
23606cf5
RW		 4586 pm_runtime_put(&pdev->dev);
4587
a61cfe4f 4588 e1000e_trigger_lsc(adapter);
bc7f75fa
AK		 4589
4590 return 0;
4591
4592err_req_irq:
7faae964 4593 pm_qos_remove_request(&adapter->pm_qos_req);
31dbe5b4 4594 e1000e_release_hw_control(adapter);
bc7f75fa 4595 e1000_power_down_phy(adapter);
55aa6985 4596 e1000e_free_rx_resources(adapter->rx_ring);
bc7f75fa 4597err_setup_rx:
55aa6985 4598 e1000e_free_tx_resources(adapter->tx_ring);
bc7f75fa
AK		 4599err_setup_tx:
4600 e1000e_reset(adapter);
23606cf5 4601 pm_runtime_put_sync(&pdev->dev);
bc7f75fa
AK		 4602
4603 return err;
4604}
4605
4606/**
d5ea45da 4607 * e1000e_close - Disables a network interface
bc7f75fa
AK		 4608 * @netdev: network interface device structure
4609 *
4610 * Returns 0, this is not allowed to fail
4611 *
4612 * The close entry point is called when an interface is de-activated
4613 * by the OS. The hardware is still under the drivers control, but
4614 * needs to be disabled. A global MAC reset is issued to stop the
4615 * hardware, and all transmit and receive resources are freed.
4616 **/
d5ea45da 4617int e1000e_close(struct net_device *netdev)
bc7f75fa
AK		 4618{
4619 struct e1000_adapter *adapter = netdev_priv(netdev);
23606cf5 4620 struct pci_dev *pdev = adapter->pdev;
bb9e44d0
BA		 4621 int count = E1000_CHECK_RESET_COUNT;
4622
4623 while (test_bit(__E1000_RESETTING, &adapter->state) && count--)
4624 usleep_range(10000, 20000);
bc7f75fa
AK		 4625
4626 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
23606cf5
RW		 4627
4628 pm_runtime_get_sync(&pdev->dev);
4629
4630 if (!test_bit(__E1000_DOWN, &adapter->state)) {
28002099 4631 e1000e_down(adapter, true);
23606cf5 4632 e1000_free_irq(adapter);
63eb48f1
DE		 4633
4634 /* Link status message must follow this format */
4635 pr_info("%s NIC Link is Down\n", adapter->netdev->name);
23606cf5 4636 }
a3b87a4c
BA		 4637
4638 napi_disable(&adapter->napi);
4639
55aa6985
BA		 4640 e1000e_free_tx_resources(adapter->tx_ring);
4641 e1000e_free_rx_resources(adapter->rx_ring);
bc7f75fa 4642
e921eb1a 4643 /* kill manageability vlan ID if supported, but not if a vlan with
ad68076e
BA		 4644 * the same ID is registered on the host OS (let 8021q kill it)
4645 */
e5fe2541 4646 if (adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN)
80d5c368
PM		 4647 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
4648 adapter->mng_vlan_id);
bc7f75fa 4649
e921eb1a 4650 /* If AMT is enabled, let the firmware know that the network
ad68076e
BA		 4651 * interface is now closed
4652 */
31dbe5b4
BA		 4653 if ((adapter->flags & FLAG_HAS_AMT) &&
4654 !test_bit(__E1000_TESTING, &adapter->state))
4655 e1000e_release_hw_control(adapter);
bc7f75fa 4656
e2c65448 4657 pm_qos_remove_request(&adapter->pm_qos_req);
c128ec29 4658
23606cf5
RW		 4659 pm_runtime_put_sync(&pdev->dev);
4660
bc7f75fa
AK		 4661 return 0;
4662}
fc830b78 4663
bc7f75fa
AK		 4664/**
4665 * e1000_set_mac - Change the Ethernet Address of the NIC
4666 * @netdev: network interface device structure
4667 * @p: pointer to an address structure
4668 *
4669 * Returns 0 on success, negative on failure
4670 **/
4671static int e1000_set_mac(struct net_device *netdev, void *p)
4672{
4673 struct e1000_adapter *adapter = netdev_priv(netdev);
69e1e019 4674 struct e1000_hw *hw = &adapter->hw;
bc7f75fa
AK		 4675 struct sockaddr *addr = p;
4676
4677 if (!is_valid_ether_addr(addr->sa_data))
4678 return -EADDRNOTAVAIL;
4679
4680 memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
4681 memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
4682
69e1e019 4683 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
bc7f75fa
AK		 4684
4685 if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) {
4686 /* activate the work around */
4687 e1000e_set_laa_state_82571(&adapter->hw, 1);
4688
e921eb1a 4689 /* Hold a copy of the LAA in RAR[14] This is done so that
bc7f75fa
AK		 4690 * between the time RAR[0] gets clobbered and the time it
4691 * gets fixed (in e1000_watchdog), the actual LAA is in one
4692 * of the RARs and no incoming packets directed to this port
4693 * are dropped. Eventually the LAA will be in RAR[0] and
ad68076e
BA		 4694 * RAR[14]
4695 */
69e1e019
BA		 4696 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr,
4697 adapter->hw.mac.rar_entry_count - 1);
bc7f75fa
AK		 4698 }
4699
4700 return 0;
4701}
4702
a8f88ff5
JB		 4703/**
4704 * e1000e_update_phy_task - work thread to update phy
4705 * @work: pointer to our work struct
4706 *
4707 * this worker thread exists because we must acquire a
4708 * semaphore to read the phy, which we could msleep while
4709 * waiting for it, and we can't msleep in a timer.
4710 **/
4711static void e1000e_update_phy_task(struct work_struct *work)
4712{
4713 struct e1000_adapter *adapter = container_of(work,
17e813ec
BA		 4714 struct e1000_adapter,
4715 update_phy_task);
a03206ed 4716 struct e1000_hw *hw = &adapter->hw;
615b32af
JB		 4717
4718 if (test_bit(__E1000_DOWN, &adapter->state))
4719 return;
4720
a03206ed
DE		 4721 e1000_get_phy_info(hw);
4722
4723 /* Enable EEE on 82579 after link up */
50844bb7 4724 if (hw->phy.type >= e1000_phy_82579)
a03206ed 4725 e1000_set_eee_pchlan(hw);
a8f88ff5
JB		 4726}
4727
e921eb1a
BA		 4728/**
4729 * e1000_update_phy_info - timre call-back to update PHY info
4730 * @data: pointer to adapter cast into an unsigned long
4731 *
ad68076e
BA		 4732 * Need to wait a few seconds after link up to get diagnostic information from
4733 * the phy
e921eb1a 4734 **/
bc7f75fa
AK		 4735static void e1000_update_phy_info(unsigned long data)
4736{
53aa82da 4737 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
615b32af
JB		 4738
4739 if (test_bit(__E1000_DOWN, &adapter->state))
4740 return;
4741
a8f88ff5 4742 schedule_work(&adapter->update_phy_task);
bc7f75fa
AK		 4743}
4744
8c7bbb92
BA		 4745/**
4746 * e1000e_update_phy_stats - Update the PHY statistics counters
4747 * @adapter: board private structure
2b6b168d
BA		 4748 *
4749 * Read/clear the upper 16-bit PHY registers and read/accumulate lower
8c7bbb92
BA		 4750 **/
4751static void e1000e_update_phy_stats(struct e1000_adapter *adapter)
4752{
4753 struct e1000_hw *hw = &adapter->hw;
4754 s32 ret_val;
4755 u16 phy_data;
4756
4757 ret_val = hw->phy.ops.acquire(hw);
4758 if (ret_val)
4759 return;
4760
e921eb1a 4761 /* A page set is expensive so check if already on desired page.
8c7bbb92
BA		 4762 * If not, set to the page with the PHY status registers.
4763 */
2b6b168d 4764 hw->phy.addr = 1;
8c7bbb92
BA		 4765 ret_val = e1000e_read_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
4766 &phy_data);
4767 if (ret_val)
4768 goto release;
2b6b168d
BA		 4769 if (phy_data != (HV_STATS_PAGE << IGP_PAGE_SHIFT)) {
4770 ret_val = hw->phy.ops.set_page(hw,
4771 HV_STATS_PAGE << IGP_PAGE_SHIFT);
8c7bbb92
BA		 4772 if (ret_val)
4773 goto release;
4774 }
4775
8c7bbb92 4776 /* Single Collision Count */
2b6b168d
BA		 4777 hw->phy.ops.read_reg_page(hw, HV_SCC_UPPER, &phy_data);
4778 ret_val = hw->phy.ops.read_reg_page(hw, HV_SCC_LOWER, &phy_data);
8c7bbb92
BA		 4779 if (!ret_val)
4780 adapter->stats.scc += phy_data;
4781
4782 /* Excessive Collision Count */
2b6b168d
BA		 4783 hw->phy.ops.read_reg_page(hw, HV_ECOL_UPPER, &phy_data);
4784 ret_val = hw->phy.ops.read_reg_page(hw, HV_ECOL_LOWER, &phy_data);
8c7bbb92
BA		 4785 if (!ret_val)
4786 adapter->stats.ecol += phy_data;
4787
4788 /* Multiple Collision Count */
2b6b168d
BA		 4789 hw->phy.ops.read_reg_page(hw, HV_MCC_UPPER, &phy_data);
4790 ret_val = hw->phy.ops.read_reg_page(hw, HV_MCC_LOWER, &phy_data);
8c7bbb92
BA		 4791 if (!ret_val)
4792 adapter->stats.mcc += phy_data;
4793
4794 /* Late Collision Count */
2b6b168d
BA		 4795 hw->phy.ops.read_reg_page(hw, HV_LATECOL_UPPER, &phy_data);
4796 ret_val = hw->phy.ops.read_reg_page(hw, HV_LATECOL_LOWER, &phy_data);
8c7bbb92
BA		 4797 if (!ret_val)
4798 adapter->stats.latecol += phy_data;
4799
4800 /* Collision Count - also used for adaptive IFS */
2b6b168d
BA		 4801 hw->phy.ops.read_reg_page(hw, HV_COLC_UPPER, &phy_data);
4802 ret_val = hw->phy.ops.read_reg_page(hw, HV_COLC_LOWER, &phy_data);
8c7bbb92
BA		 4803 if (!ret_val)
4804 hw->mac.collision_delta = phy_data;
4805
4806 /* Defer Count */
2b6b168d
BA		 4807 hw->phy.ops.read_reg_page(hw, HV_DC_UPPER, &phy_data);
4808 ret_val = hw->phy.ops.read_reg_page(hw, HV_DC_LOWER, &phy_data);
8c7bbb92
BA		 4809 if (!ret_val)
4810 adapter->stats.dc += phy_data;
4811
4812 /* Transmit with no CRS */
2b6b168d
BA		 4813 hw->phy.ops.read_reg_page(hw, HV_TNCRS_UPPER, &phy_data);
4814 ret_val = hw->phy.ops.read_reg_page(hw, HV_TNCRS_LOWER, &phy_data);
8c7bbb92
BA		 4815 if (!ret_val)
4816 adapter->stats.tncrs += phy_data;
4817
4818release:
4819 hw->phy.ops.release(hw);
4820}
4821
bc7f75fa
AK		 4822/**
4823 * e1000e_update_stats - Update the board statistics counters
4824 * @adapter: board private structure
4825 **/
67fd4fcb 4826static void e1000e_update_stats(struct e1000_adapter *adapter)
bc7f75fa 4827{
7274c20f 4828 struct net_device *netdev = adapter->netdev;
bc7f75fa
AK		 4829 struct e1000_hw *hw = &adapter->hw;
4830 struct pci_dev *pdev = adapter->pdev;
bc7f75fa 4831
e921eb1a 4832 /* Prevent stats update while adapter is being reset, or if the pci
bc7f75fa
AK		 4833 * connection is down.
4834 */
4835 if (adapter->link_speed == 0)
4836 return;
4837 if (pci_channel_offline(pdev))
4838 return;
4839
bc7f75fa
AK		 4840 adapter->stats.crcerrs += er32(CRCERRS);
4841 adapter->stats.gprc += er32(GPRC);
7c25769f 4842 adapter->stats.gorc += er32(GORCL);
e80bd1d1 4843 er32(GORCH); /* Clear gorc */
bc7f75fa
AK		 4844 adapter->stats.bprc += er32(BPRC);
4845 adapter->stats.mprc += er32(MPRC);
4846 adapter->stats.roc += er32(ROC);
4847
bc7f75fa 4848 adapter->stats.mpc += er32(MPC);
8c7bbb92
BA		 4849
4850 /* Half-duplex statistics */
4851 if (adapter->link_duplex == HALF_DUPLEX) {
4852 if (adapter->flags2 & FLAG2_HAS_PHY_STATS) {
4853 e1000e_update_phy_stats(adapter);
4854 } else {
4855 adapter->stats.scc += er32(SCC);
4856 adapter->stats.ecol += er32(ECOL);
4857 adapter->stats.mcc += er32(MCC);
4858 adapter->stats.latecol += er32(LATECOL);
4859 adapter->stats.dc += er32(DC);
4860
4861 hw->mac.collision_delta = er32(COLC);
4862
4863 if ((hw->mac.type != e1000_82574) &&
4864 (hw->mac.type != e1000_82583))
4865 adapter->stats.tncrs += er32(TNCRS);
4866 }
4867 adapter->stats.colc += hw->mac.collision_delta;
a4f58f54 4868 }
8c7bbb92 4869
bc7f75fa
AK		 4870 adapter->stats.xonrxc += er32(XONRXC);
4871 adapter->stats.xontxc += er32(XONTXC);
4872 adapter->stats.xoffrxc += er32(XOFFRXC);
4873 adapter->stats.xofftxc += er32(XOFFTXC);
bc7f75fa 4874 adapter->stats.gptc += er32(GPTC);
7c25769f 4875 adapter->stats.gotc += er32(GOTCL);
e80bd1d1 4876 er32(GOTCH); /* Clear gotc */
bc7f75fa
AK		 4877 adapter->stats.rnbc += er32(RNBC);
4878 adapter->stats.ruc += er32(RUC);
bc7f75fa
AK		 4879
4880 adapter->stats.mptc += er32(MPTC);
4881 adapter->stats.bptc += er32(BPTC);
4882
4883 /* used for adaptive IFS */
4884
4885 hw->mac.tx_packet_delta = er32(TPT);
4886 adapter->stats.tpt += hw->mac.tx_packet_delta;
bc7f75fa
AK		 4887
4888 adapter->stats.algnerrc += er32(ALGNERRC);
4889 adapter->stats.rxerrc += er32(RXERRC);
bc7f75fa
AK		 4890 adapter->stats.cexterr += er32(CEXTERR);
4891 adapter->stats.tsctc += er32(TSCTC);
4892 adapter->stats.tsctfc += er32(TSCTFC);
4893
bc7f75fa 4894 /* Fill out the OS statistics structure */
7274c20f
AK		 4895 netdev->stats.multicast = adapter->stats.mprc;
4896 netdev->stats.collisions = adapter->stats.colc;
bc7f75fa
AK		 4897
4898 /* Rx Errors */
4899
e921eb1a 4900 /* RLEC on some newer hardware can be incorrect so build
ad68076e
BA		 4901 * our own version based on RUC and ROC
4902 */
7274c20f 4903 netdev->stats.rx_errors = adapter->stats.rxerrc +
f0ff4398
BA		 4904 adapter->stats.crcerrs + adapter->stats.algnerrc +
4905 adapter->stats.ruc + adapter->stats.roc + adapter->stats.cexterr;
7274c20f 4906 netdev->stats.rx_length_errors = adapter->stats.ruc +
f0ff4398 4907 adapter->stats.roc;
7274c20f
AK		 4908 netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
4909 netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
4910 netdev->stats.rx_missed_errors = adapter->stats.mpc;
bc7f75fa
AK		 4911
4912 /* Tx Errors */
f0ff4398 4913 netdev->stats.tx_errors = adapter->stats.ecol + adapter->stats.latecol;
7274c20f
AK		 4914 netdev->stats.tx_aborted_errors = adapter->stats.ecol;
4915 netdev->stats.tx_window_errors = adapter->stats.latecol;
4916 netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
bc7f75fa
AK		 4917
4918 /* Tx Dropped needs to be maintained elsewhere */
4919
bc7f75fa
AK		 4920 /* Management Stats */
4921 adapter->stats.mgptc += er32(MGTPTC);
4922 adapter->stats.mgprc += er32(MGTPRC);
4923 adapter->stats.mgpdc += er32(MGTPDC);
94fb848b
BA		 4924
4925 /* Correctable ECC Errors */
79849ebc
DE		 4926 if ((hw->mac.type == e1000_pch_lpt) ||
4927 (hw->mac.type == e1000_pch_spt)) {
94fb848b 4928 u32 pbeccsts = er32(PBECCSTS);
6cf08d1c 4929
94fb848b
BA		 4930 adapter->corr_errors +=
4931 pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
4932 adapter->uncorr_errors +=
4933 (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
4934 E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
4935 }
bc7f75fa
AK		 4936}
4937
7c25769f
BA		 4938/**
4939 * e1000_phy_read_status - Update the PHY register status snapshot
4940 * @adapter: board private structure
4941 **/
4942static void e1000_phy_read_status(struct e1000_adapter *adapter)
4943{
4944 struct e1000_hw *hw = &adapter->hw;
4945 struct e1000_phy_regs *phy = &adapter->phy_regs;
7c25769f 4946
97390ab8
BA		 4947 if (!pm_runtime_suspended((&adapter->pdev->dev)->parent) &&
4948 (er32(STATUS) & E1000_STATUS_LU) &&
7c25769f 4949 (adapter->hw.phy.media_type == e1000_media_type_copper)) {
90da0669
BA		 4950 int ret_val;
4951
c2ade1a4
BA		 4952 ret_val = e1e_rphy(hw, MII_BMCR, &phy->bmcr);
4953 ret_val |= e1e_rphy(hw, MII_BMSR, &phy->bmsr);
4954 ret_val |= e1e_rphy(hw, MII_ADVERTISE, &phy->advertise);
4955 ret_val |= e1e_rphy(hw, MII_LPA, &phy->lpa);
4956 ret_val |= e1e_rphy(hw, MII_EXPANSION, &phy->expansion);
4957 ret_val |= e1e_rphy(hw, MII_CTRL1000, &phy->ctrl1000);
4958 ret_val |= e1e_rphy(hw, MII_STAT1000, &phy->stat1000);
4959 ret_val |= e1e_rphy(hw, MII_ESTATUS, &phy->estatus);
7c25769f 4960 if (ret_val)
44defeb3 4961 e_warn("Error reading PHY register\n");
7c25769f 4962 } else {
e921eb1a 4963 /* Do not read PHY registers if link is not up
7c25769f
BA		 4964 * Set values to typical power-on defaults
4965 */
4966 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX);
4967 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL |
4968 BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE |
4969 BMSR_ERCAP);
4970 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP |
4971 ADVERTISE_ALL | ADVERTISE_CSMA);
4972 phy->lpa = 0;
4973 phy->expansion = EXPANSION_ENABLENPAGE;
4974 phy->ctrl1000 = ADVERTISE_1000FULL;
4975 phy->stat1000 = 0;
4976 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF);
4977 }
7c25769f
BA		 4978}
4979
bc7f75fa
AK		 4980static void e1000_print_link_info(struct e1000_adapter *adapter)
4981{
bc7f75fa
AK		 4982 struct e1000_hw *hw = &adapter->hw;
4983 u32 ctrl = er32(CTRL);
4984
8f12fe86 4985 /* Link status message must follow this format for user tools */
7dbc1672
BA		 4986 pr_info("%s NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n",
4987 adapter->netdev->name, adapter->link_speed,
ef456f85
JK		 4988 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half",
4989 (ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE) ? "Rx/Tx" :
4990 (ctrl & E1000_CTRL_RFCE) ? "Rx" :
4991 (ctrl & E1000_CTRL_TFCE) ? "Tx" : "None");
bc7f75fa
AK		 4992}
4993
0c6bdb30 4994static bool e1000e_has_link(struct e1000_adapter *adapter)
318a94d6
JK		 4995{
4996 struct e1000_hw *hw = &adapter->hw;
3db1cd5c 4997 bool link_active = false;
318a94d6
JK		 4998 s32 ret_val = 0;
4999
e921eb1a 5000 /* get_link_status is set on LSC (link status) interrupt or
318a94d6
JK		 5001 * Rx sequence error interrupt. get_link_status will stay
5002 * false until the check_for_link establishes link
5003 * for copper adapters ONLY
5004 */
5005 switch (hw->phy.media_type) {
5006 case e1000_media_type_copper:
5007 if (hw->mac.get_link_status) {
5008 ret_val = hw->mac.ops.check_for_link(hw);
5009 link_active = !hw->mac.get_link_status;
5010 } else {
3db1cd5c 5011 link_active = true;
318a94d6
JK		 5012 }
5013 break;
5014 case e1000_media_type_fiber:
5015 ret_val = hw->mac.ops.check_for_link(hw);
5016 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
5017 break;
5018 case e1000_media_type_internal_serdes:
5019 ret_val = hw->mac.ops.check_for_link(hw);
5020 link_active = adapter->hw.mac.serdes_has_link;
5021 break;
5022 default:
5023 case e1000_media_type_unknown:
5024 break;
5025 }
5026
5027 if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
5028 (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
5029 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
44defeb3 5030 e_info("Gigabit has been disabled, downgrading speed\n");
318a94d6
JK		 5031 }
5032
5033 return link_active;
5034}
5035
5036static void e1000e_enable_receives(struct e1000_adapter *adapter)
5037{
5038 /* make sure the receive unit is started */
5039 if ((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
12d43f7d 5040 (adapter->flags & FLAG_RESTART_NOW)) {
318a94d6
JK		 5041 struct e1000_hw *hw = &adapter->hw;
5042 u32 rctl = er32(RCTL);
6cf08d1c 5043
318a94d6 5044 ew32(RCTL, rctl | E1000_RCTL_EN);
12d43f7d 5045 adapter->flags &= ~FLAG_RESTART_NOW;
318a94d6
JK		 5046 }
5047}
5048
ff10e13c
CW		 5049static void e1000e_check_82574_phy_workaround(struct e1000_adapter *adapter)
5050{
5051 struct e1000_hw *hw = &adapter->hw;
5052
e921eb1a 5053 /* With 82574 controllers, PHY needs to be checked periodically
ff10e13c
CW		 5054 * for hung state and reset, if two calls return true
5055 */
5056 if (e1000_check_phy_82574(hw))
5057 adapter->phy_hang_count++;
5058 else
5059 adapter->phy_hang_count = 0;
5060
5061 if (adapter->phy_hang_count > 1) {
5062 adapter->phy_hang_count = 0;
d9554e96 5063 e_dbg("PHY appears hung - resetting\n");
ff10e13c
CW		 5064 schedule_work(&adapter->reset_task);
5065 }
5066}
5067
bc7f75fa
AK		 5068/**
5069 * e1000_watchdog - Timer Call-back
5070 * @data: pointer to adapter cast into an unsigned long
5071 **/
5072static void e1000_watchdog(unsigned long data)
5073{
53aa82da 5074 struct e1000_adapter *adapter = (struct e1000_adapter *)data;
bc7f75fa
AK		 5075
5076 /* Do the rest outside of interrupt context */
5077 schedule_work(&adapter->watchdog_task);
5078
5079 /* TODO: make this use queue_delayed_work() */
5080}
5081
5082static void e1000_watchdog_task(struct work_struct *work)
5083{
5084 struct e1000_adapter *adapter = container_of(work,
17e813ec
BA		 5085 struct e1000_adapter,
5086 watchdog_task);
bc7f75fa
AK		 5087 struct net_device *netdev = adapter->netdev;
5088 struct e1000_mac_info *mac = &adapter->hw.mac;
75eb0fad 5089 struct e1000_phy_info *phy = &adapter->hw.phy;
bc7f75fa
AK		 5090 struct e1000_ring *tx_ring = adapter->tx_ring;
5091 struct e1000_hw *hw = &adapter->hw;
5092 u32 link, tctl;
bc7f75fa 5093
615b32af
JB		 5094 if (test_bit(__E1000_DOWN, &adapter->state))
5095 return;
5096
b405e8df 5097 link = e1000e_has_link(adapter);
318a94d6 5098 if ((netif_carrier_ok(netdev)) && link) {
23606cf5
RW		 5099 /* Cancel scheduled suspend requests. */
5100 pm_runtime_resume(netdev->dev.parent);
5101
318a94d6 5102 e1000e_enable_receives(adapter);
bc7f75fa 5103 goto link_up;
bc7f75fa
AK		 5104 }
5105
5106 if ((e1000e_enable_tx_pkt_filtering(hw)) &&
5107 (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id))
5108 e1000_update_mng_vlan(adapter);
5109
bc7f75fa
AK		 5110 if (link) {
5111 if (!netif_carrier_ok(netdev)) {
3db1cd5c 5112 bool txb2b = true;
23606cf5
RW		 5113
5114 /* Cancel scheduled suspend requests. */
5115 pm_runtime_resume(netdev->dev.parent);
5116
318a94d6 5117 /* update snapshot of PHY registers on LSC */
7c25769f 5118 e1000_phy_read_status(adapter);
bc7f75fa 5119 mac->ops.get_link_up_info(&adapter->hw,
17e813ec
BA		 5120 &adapter->link_speed,
5121 &adapter->link_duplex);
bc7f75fa 5122 e1000_print_link_info(adapter);
e792cd91
KS		 5123
5124 /* check if SmartSpeed worked */
5125 e1000e_check_downshift(hw);
5126 if (phy->speed_downgraded)
5127 netdev_warn(netdev,
5128 "Link Speed was downgraded by SmartSpeed\n");
5129
e921eb1a 5130 /* On supported PHYs, check for duplex mismatch only
f4187b56
BA		 5131 * if link has autonegotiated at 10/100 half
5132 */
5133 if ((hw->phy.type == e1000_phy_igp_3 ||
5134 hw->phy.type == e1000_phy_bm) &&
138953bb 5135 hw->mac.autoneg &&
f4187b56
BA		 5136 (adapter->link_speed == SPEED_10 ||
5137 adapter->link_speed == SPEED_100) &&
5138 (adapter->link_duplex == HALF_DUPLEX)) {
5139 u16 autoneg_exp;
5140
c2ade1a4 5141 e1e_rphy(hw, MII_EXPANSION, &autoneg_exp);
f4187b56 5142
c2ade1a4 5143 if (!(autoneg_exp & EXPANSION_NWAY))
ef456f85 5144 e_info("Autonegotiated half duplex but link partner cannot autoneg. Try forcing full duplex if link gets many collisions.\n");
f4187b56
BA		 5145 }
5146
f49c57e1 5147 /* adjust timeout factor according to speed/duplex */
bc7f75fa
AK		 5148 adapter->tx_timeout_factor = 1;
5149 switch (adapter->link_speed) {
5150 case SPEED_10:
3db1cd5c 5151 txb2b = false;
10f1b492 5152 adapter->tx_timeout_factor = 16;
bc7f75fa
AK		 5153 break;
5154 case SPEED_100:
3db1cd5c 5155 txb2b = false;
4c86e0b9 5156 adapter->tx_timeout_factor = 10;
bc7f75fa
AK		 5157 break;
5158 }
5159
e921eb1a 5160 /* workaround: re-program speed mode bit after
ad68076e
BA		 5161 * link-up event
5162 */
bc7f75fa
AK		 5163 if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) &&
5164 !txb2b) {
5165 u32 tarc0;
6cf08d1c 5166
e9ec2c0f 5167 tarc0 = er32(TARC(0));
bc7f75fa 5168 tarc0 &= ~SPEED_MODE_BIT;
e9ec2c0f 5169 ew32(TARC(0), tarc0);
bc7f75fa
AK		 5170 }
5171
e921eb1a 5172 /* disable TSO for pcie and 10/100 speeds, to avoid
ad68076e
BA		 5173 * some hardware issues
5174 */
bc7f75fa
AK		 5175 if (!(adapter->flags & FLAG_TSO_FORCE)) {
5176 switch (adapter->link_speed) {
5177 case SPEED_10:
5178 case SPEED_100:
44defeb3 5179 e_info("10/100 speed: disabling TSO\n");
bc7f75fa
AK		 5180 netdev->features &= ~NETIF_F_TSO;
5181 netdev->features &= ~NETIF_F_TSO6;
5182 break;
5183 case SPEED_1000:
5184 netdev->features |= NETIF_F_TSO;
5185 netdev->features |= NETIF_F_TSO6;
5186 break;
5187 default:
5188 /* oops */
5189 break;
5190 }
5191 }
5192
e921eb1a 5193 /* enable transmits in the hardware, need to do this
ad68076e
BA		 5194 * after setting TARC(0)
5195 */
bc7f75fa
AK		 5196 tctl = er32(TCTL);
5197 tctl |= E1000_TCTL_EN;
5198 ew32(TCTL, tctl);
5199
e921eb1a 5200 /* Perform any post-link-up configuration before
75eb0fad
BA		 5201 * reporting link up.
5202 */
5203 if (phy->ops.cfg_on_link_up)
5204 phy->ops.cfg_on_link_up(hw);
5205
bc7f75fa 5206 netif_carrier_on(netdev);
bc7f75fa
AK		 5207
5208 if (!test_bit(__E1000_DOWN, &adapter->state))
5209 mod_timer(&adapter->phy_info_timer,
5210 round_jiffies(jiffies + 2 * HZ));
bc7f75fa
AK		 5211 }
5212 } else {
5213 if (netif_carrier_ok(netdev)) {
5214 adapter->link_speed = 0;
5215 adapter->link_duplex = 0;
8f12fe86 5216 /* Link status message must follow this format */
7dbc1672 5217 pr_info("%s NIC Link is Down\n", adapter->netdev->name);
bc7f75fa 5218 netif_carrier_off(netdev);
bc7f75fa
AK		 5219 if (!test_bit(__E1000_DOWN, &adapter->state))
5220 mod_timer(&adapter->phy_info_timer,
5221 round_jiffies(jiffies + 2 * HZ));
5222
d9554e96
DE		 5223 /* 8000ES2LAN requires a Rx packet buffer work-around
5224 * on link down event; reset the controller to flush
5225 * the Rx packet buffer.
12d43f7d 5226 */
d9554e96 5227 if (adapter->flags & FLAG_RX_NEEDS_RESTART)
12d43f7d 5228 adapter->flags |= FLAG_RESTART_NOW;
23606cf5
RW		 5229 else
5230 pm_schedule_suspend(netdev->dev.parent,
17e813ec 5231 LINK_TIMEOUT);
bc7f75fa
AK		 5232 }
5233 }
5234
5235link_up:
67fd4fcb 5236 spin_lock(&adapter->stats64_lock);
bc7f75fa
AK		 5237 e1000e_update_stats(adapter);
5238
5239 mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
5240 adapter->tpt_old = adapter->stats.tpt;
5241 mac->collision_delta = adapter->stats.colc - adapter->colc_old;
5242 adapter->colc_old = adapter->stats.colc;
5243
7c25769f
BA		 5244 adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
5245 adapter->gorc_old = adapter->stats.gorc;
5246 adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
5247 adapter->gotc_old = adapter->stats.gotc;
2084b114 5248 spin_unlock(&adapter->stats64_lock);
bc7f75fa 5249
d9554e96
DE		 5250 /* If the link is lost the controller stops DMA, but
5251 * if there is queued Tx work it cannot be done. So
5252 * reset the controller to flush the Tx packet buffers.
5253 */
5254 if (!netif_carrier_ok(netdev) &&
5255 (e1000_desc_unused(tx_ring) + 1 < tx_ring->count))
5256 adapter->flags |= FLAG_RESTART_NOW;
5257
5258 /* If reset is necessary, do it outside of interrupt context. */
12d43f7d 5259 if (adapter->flags & FLAG_RESTART_NOW) {
90da0669
BA		 5260 schedule_work(&adapter->reset_task);
5261 /* return immediately since reset is imminent */
5262 return;
bc7f75fa
AK		 5263 }
5264
12d43f7d
BA		 5265 e1000e_update_adaptive(&adapter->hw);
5266
eab2abf5
JB		 5267 /* Simple mode for Interrupt Throttle Rate (ITR) */
5268 if (adapter->itr_setting == 4) {
e921eb1a 5269 /* Symmetric Tx/Rx gets a reduced ITR=2000;
eab2abf5
JB		 5270 * Total asymmetrical Tx or Rx gets ITR=8000;
5271 * everyone else is between 2000-8000.
5272 */
5273 u32 goc = (adapter->gotc + adapter->gorc) / 10000;
5274 u32 dif = (adapter->gotc > adapter->gorc ?
17e813ec
BA		 5275 adapter->gotc - adapter->gorc :
5276 adapter->gorc - adapter->gotc) / 10000;
eab2abf5
JB		 5277 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
5278
22a4cca2 5279 e1000e_write_itr(adapter, itr);
eab2abf5
JB		 5280 }
5281
ad68076e 5282 /* Cause software interrupt to ensure Rx ring is cleaned */
4662e82b
BA		 5283 if (adapter->msix_entries)
5284 ew32(ICS, adapter->rx_ring->ims_val);
5285 else
5286 ew32(ICS, E1000_ICS_RXDMT0);
bc7f75fa 5287
713b3c9e
JB		 5288 /* flush pending descriptors to memory before detecting Tx hang */
5289 e1000e_flush_descriptors(adapter);
5290
bc7f75fa 5291 /* Force detection of hung controller every watchdog period */
3db1cd5c 5292 adapter->detect_tx_hung = true;
bc7f75fa 5293
e921eb1a 5294 /* With 82571 controllers, LAA may be overwritten due to controller
ad68076e
BA		 5295 * reset from the other port. Set the appropriate LAA in RAR[0]
5296 */
bc7f75fa 5297 if (e1000e_get_laa_state_82571(hw))
69e1e019 5298 hw->mac.ops.rar_set(hw, adapter->hw.mac.addr, 0);
bc7f75fa 5299
ff10e13c
CW		 5300 if (adapter->flags2 & FLAG2_CHECK_PHY_HANG)
5301 e1000e_check_82574_phy_workaround(adapter);
5302
b67e1913
BA		 5303 /* Clear valid timestamp stuck in RXSTMPL/H due to a Rx error */
5304 if (adapter->hwtstamp_config.rx_filter != HWTSTAMP_FILTER_NONE) {
5305 if ((adapter->flags2 & FLAG2_CHECK_RX_HWTSTAMP) &&
5306 (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID)) {
5307 er32(RXSTMPH);
5308 adapter->rx_hwtstamp_cleared++;
5309 } else {
5310 adapter->flags2 |= FLAG2_CHECK_RX_HWTSTAMP;
5311 }
5312 }
5313
bc7f75fa
AK		 5314 /* Reset the timer */
5315 if (!test_bit(__E1000_DOWN, &adapter->state))
5316 mod_timer(&adapter->watchdog_timer,
5317 round_jiffies(jiffies + 2 * HZ));
5318}
5319
5320#define E1000_TX_FLAGS_CSUM 0x00000001
5321#define E1000_TX_FLAGS_VLAN 0x00000002
5322#define E1000_TX_FLAGS_TSO 0x00000004
5323#define E1000_TX_FLAGS_IPV4 0x00000008
943146de 5324#define E1000_TX_FLAGS_NO_FCS 0x00000010
b67e1913 5325#define E1000_TX_FLAGS_HWTSTAMP 0x00000020
bc7f75fa
AK		 5326#define E1000_TX_FLAGS_VLAN_MASK 0xffff0000
5327#define E1000_TX_FLAGS_VLAN_SHIFT 16
5328
47ccd1ed
VY		 5329static int e1000_tso(struct e1000_ring *tx_ring, struct sk_buff *skb,
5330 __be16 protocol)
bc7f75fa 5331{
bc7f75fa
AK		 5332 struct e1000_context_desc *context_desc;
5333 struct e1000_buffer *buffer_info;
5334 unsigned int i;
5335 u32 cmd_length = 0;
70443ae9 5336 u16 ipcse = 0, mss;
bc7f75fa 5337 u8 ipcss, ipcso, tucss, tucso, hdr_len;
bcf1f57f 5338 int err;
bc7f75fa 5339
3d5e33c9
BA		 5340 if (!skb_is_gso(skb))
5341 return 0;
bc7f75fa 5342
bcf1f57f
FR		 5343 err = skb_cow_head(skb, 0);
5344 if (err < 0)
5345 return err;
bc7f75fa 5346
3d5e33c9
BA		 5347 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
5348 mss = skb_shinfo(skb)->gso_size;
47ccd1ed 5349 if (protocol == htons(ETH_P_IP)) {
3d5e33c9
BA		 5350 struct iphdr *iph = ip_hdr(skb);
5351 iph->tot_len = 0;
5352 iph->check = 0;
5353 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
f0ff4398 5354 0, IPPROTO_TCP, 0);
3d5e33c9
BA		 5355 cmd_length = E1000_TXD_CMD_IP;
5356 ipcse = skb_transport_offset(skb) - 1;
8e1e8a47 5357 } else if (skb_is_gso_v6(skb)) {
3d5e33c9
BA		 5358 ipv6_hdr(skb)->payload_len = 0;
5359 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
f0ff4398
BA		 5360 &ipv6_hdr(skb)->daddr,
5361 0, IPPROTO_TCP, 0);
3d5e33c9
BA		 5362 ipcse = 0;
5363 }
5364 ipcss = skb_network_offset(skb);
5365 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
5366 tucss = skb_transport_offset(skb);
5367 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
3d5e33c9
BA		 5368
5369 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
f0ff4398 5370 E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
3d5e33c9
BA		 5371
5372 i = tx_ring->next_to_use;
5373 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
5374 buffer_info = &tx_ring->buffer_info[i];
5375
e80bd1d1
BA		 5376 context_desc->lower_setup.ip_fields.ipcss = ipcss;
5377 context_desc->lower_setup.ip_fields.ipcso = ipcso;
5378 context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
3d5e33c9
BA		 5379 context_desc->upper_setup.tcp_fields.tucss = tucss;
5380 context_desc->upper_setup.tcp_fields.tucso = tucso;
70443ae9 5381 context_desc->upper_setup.tcp_fields.tucse = 0;
e80bd1d1 5382 context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
3d5e33c9
BA		 5383 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
5384 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
5385
5386 buffer_info->time_stamp = jiffies;
5387 buffer_info->next_to_watch = i;
5388
5389 i++;
5390 if (i == tx_ring->count)
5391 i = 0;
5392 tx_ring->next_to_use = i;
5393
5394 return 1;
bc7f75fa
AK		 5395}
5396
47ccd1ed
VY		 5397static bool e1000_tx_csum(struct e1000_ring *tx_ring, struct sk_buff *skb,
5398 __be16 protocol)
bc7f75fa 5399{
55aa6985 5400 struct e1000_adapter *adapter = tx_ring->adapter;
bc7f75fa
AK		 5401 struct e1000_context_desc *context_desc;
5402 struct e1000_buffer *buffer_info;
5403 unsigned int i;
5404 u8 css;
af807c82 5405 u32 cmd_len = E1000_TXD_CMD_DEXT;
bc7f75fa 5406
af807c82 5407 if (skb->ip_summed != CHECKSUM_PARTIAL)
3992c8ed 5408 return false;
bc7f75fa 5409
3f518390 5410 switch (protocol) {
09640e63 5411 case cpu_to_be16(ETH_P_IP):
af807c82
DG		 5412 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
5413 cmd_len |= E1000_TXD_CMD_TCP;
5414 break;
09640e63 5415 case cpu_to_be16(ETH_P_IPV6):
af807c82
DG		 5416 /* XXX not handling all IPV6 headers */
5417 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
5418 cmd_len |= E1000_TXD_CMD_TCP;
5419 break;
5420 default:
5421 if (unlikely(net_ratelimit()))
5f66f208
AJ		 5422 e_warn("checksum_partial proto=%x!\n",
5423 be16_to_cpu(protocol));
af807c82 5424 break;
bc7f75fa
AK		 5425 }
5426
0d0b1672 5427 css = skb_checksum_start_offset(skb);
af807c82
DG		 5428
5429 i = tx_ring->next_to_use;
5430 buffer_info = &tx_ring->buffer_info[i];
5431 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
5432
5433 context_desc->lower_setup.ip_config = 0;
5434 context_desc->upper_setup.tcp_fields.tucss = css;
f0ff4398 5435 context_desc->upper_setup.tcp_fields.tucso = css + skb->csum_offset;
af807c82
DG		 5436 context_desc->upper_setup.tcp_fields.tucse = 0;
5437 context_desc->tcp_seg_setup.data = 0;
5438 context_desc->cmd_and_length = cpu_to_le32(cmd_len);
5439
5440 buffer_info->time_stamp = jiffies;
5441 buffer_info->next_to_watch = i;
5442
5443 i++;
5444 if (i == tx_ring->count)
5445 i = 0;
5446 tx_ring->next_to_use = i;
5447
3992c8ed 5448 return true;
bc7f75fa
AK		 5449}
5450
55aa6985
BA		 5451static int e1000_tx_map(struct e1000_ring *tx_ring, struct sk_buff *skb,
5452 unsigned int first, unsigned int max_per_txd,
d821a4c4 5453 unsigned int nr_frags)
bc7f75fa 5454{
55aa6985 5455 struct e1000_adapter *adapter = tx_ring->adapter;
03b1320d 5456 struct pci_dev *pdev = adapter->pdev;
1b7719c4 5457 struct e1000_buffer *buffer_info;
8ddc951c 5458 unsigned int len = skb_headlen(skb);
03b1320d 5459 unsigned int offset = 0, size, count = 0, i;
9ed318d5 5460 unsigned int f, bytecount, segs;
bc7f75fa
AK		 5461
5462 i = tx_ring->next_to_use;
5463
5464 while (len) {
1b7719c4 5465 buffer_info = &tx_ring->buffer_info[i];
bc7f75fa
AK		 5466 size = min(len, max_per_txd);
5467
bc7f75fa 5468 buffer_info->length = size;
bc7f75fa 5469 buffer_info->time_stamp = jiffies;
bc7f75fa 5470 buffer_info->next_to_watch = i;
0be3f55f
NN		 5471 buffer_info->dma = dma_map_single(&pdev->dev,
5472 skb->data + offset,
af667a29 5473 size, DMA_TO_DEVICE);
03b1320d 5474 buffer_info->mapped_as_page = false;
0be3f55f 5475 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
03b1320d 5476 goto dma_error;
bc7f75fa
AK		 5477
5478 len -= size;
5479 offset += size;
03b1320d 5480 count++;
1b7719c4
AD		 5481
5482 if (len) {
5483 i++;
5484 if (i == tx_ring->count)
5485 i = 0;
5486 }
bc7f75fa
AK		 5487 }
5488
5489 for (f = 0; f < nr_frags; f++) {
9e903e08 5490 const struct skb_frag_struct *frag;
bc7f75fa
AK		 5491
5492 frag = &skb_shinfo(skb)->frags[f];
9e903e08 5493 len = skb_frag_size(frag);
877749bf 5494 offset = 0;
bc7f75fa
AK		 5495
5496 while (len) {
1b7719c4
AD		 5497 i++;
5498 if (i == tx_ring->count)
5499 i = 0;
5500
bc7f75fa
AK		 5501 buffer_info = &tx_ring->buffer_info[i];
5502 size = min(len, max_per_txd);
bc7f75fa
AK		 5503
5504 buffer_info->length = size;
5505 buffer_info->time_stamp = jiffies;
bc7f75fa 5506 buffer_info->next_to_watch = i;
877749bf 5507 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
17e813ec
BA		 5508 offset, size,
5509 DMA_TO_DEVICE);
03b1320d 5510 buffer_info->mapped_as_page = true;
0be3f55f 5511 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
03b1320d 5512 goto dma_error;
bc7f75fa
AK		 5513
5514 len -= size;
5515 offset += size;
5516 count++;
bc7f75fa
AK		 5517 }
5518 }
5519
af667a29 5520 segs = skb_shinfo(skb)->gso_segs ? : 1;
9ed318d5
TH		 5521 /* multiply data chunks by size of headers */
5522 bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
5523
bc7f75fa 5524 tx_ring->buffer_info[i].skb = skb;
9ed318d5
TH		 5525 tx_ring->buffer_info[i].segs = segs;
5526 tx_ring->buffer_info[i].bytecount = bytecount;
bc7f75fa
AK		 5527 tx_ring->buffer_info[first].next_to_watch = i;
5528
5529 return count;
03b1320d
AD		 5530
5531dma_error:
af667a29 5532 dev_err(&pdev->dev, "Tx DMA map failed\n");
03b1320d 5533 buffer_info->dma = 0;
c1fa347f 5534 if (count)
03b1320d 5535 count--;
c1fa347f
RK		 5536
5537 while (count--) {
af667a29 5538 if (i == 0)
03b1320d 5539 i += tx_ring->count;
c1fa347f 5540 i--;
03b1320d 5541 buffer_info = &tx_ring->buffer_info[i];
55aa6985 5542 e1000_put_txbuf(tx_ring, buffer_info);
03b1320d
AD		 5543 }
5544
5545 return 0;
bc7f75fa
AK		 5546}
5547
55aa6985 5548static void e1000_tx_queue(struct e1000_ring *tx_ring, int tx_flags, int count)
bc7f75fa 5549{
55aa6985 5550 struct e1000_adapter *adapter = tx_ring->adapter;
bc7f75fa
AK		 5551 struct e1000_tx_desc *tx_desc = NULL;
5552 struct e1000_buffer *buffer_info;
5553 u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
5554 unsigned int i;
5555
5556 if (tx_flags & E1000_TX_FLAGS_TSO) {
5557 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
f0ff4398 5558 E1000_TXD_CMD_TSE;
bc7f75fa
AK		 5559 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
5560
5561 if (tx_flags & E1000_TX_FLAGS_IPV4)
5562 txd_upper |= E1000_TXD_POPTS_IXSM << 8;
5563 }
5564
5565 if (tx_flags & E1000_TX_FLAGS_CSUM) {
5566 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
5567 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
5568 }
5569
5570 if (tx_flags & E1000_TX_FLAGS_VLAN) {
5571 txd_lower |= E1000_TXD_CMD_VLE;
5572 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
5573 }
5574
943146de
BG		 5575 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
5576 txd_lower &= ~(E1000_TXD_CMD_IFCS);
5577
b67e1913
BA		 5578 if (unlikely(tx_flags & E1000_TX_FLAGS_HWTSTAMP)) {
5579 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
5580 txd_upper |= E1000_TXD_EXTCMD_TSTAMP;
5581 }
5582
bc7f75fa
AK		 5583 i = tx_ring->next_to_use;
5584
36b973df 5585 do {
bc7f75fa
AK		 5586 buffer_info = &tx_ring->buffer_info[i];
5587 tx_desc = E1000_TX_DESC(*tx_ring, i);
5588 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
f0ff4398
BA		 5589 tx_desc->lower.data = cpu_to_le32(txd_lower |
5590 buffer_info->length);
bc7f75fa
AK		 5591 tx_desc->upper.data = cpu_to_le32(txd_upper);
5592
5593 i++;
5594 if (i == tx_ring->count)
5595 i = 0;
36b973df 5596 } while (--count > 0);
bc7f75fa
AK		 5597
5598 tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
5599
943146de
BG		 5600 /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
5601 if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
5602 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
5603
e921eb1a 5604 /* Force memory writes to complete before letting h/w
bc7f75fa
AK		 5605 * know there are new descriptors to fetch. (Only
5606 * applicable for weak-ordered memory model archs,
ad68076e
BA		 5607 * such as IA-64).
5608 */
bc7f75fa
AK		 5609 wmb();
5610
5611 tx_ring->next_to_use = i;
bc7f75fa
AK		 5612}
5613
5614#define MINIMUM_DHCP_PACKET_SIZE 282
5615static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
5616 struct sk_buff *skb)
5617{
e80bd1d1 5618 struct e1000_hw *hw = &adapter->hw;
bc7f75fa
AK		 5619 u16 length, offset;
5620
df8a39de
JP		 5621 if (skb_vlan_tag_present(skb) &&
5622 !((skb_vlan_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
d60923c4
BA		 5623 (adapter->hw.mng_cookie.status &
5624 E1000_MNG_DHCP_COOKIE_STATUS_VLAN)))
5625 return 0;
bc7f75fa
AK		 5626
5627 if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
5628 return 0;
5629
53aa82da 5630 if (((struct ethhdr *)skb->data)->h_proto != htons(ETH_P_IP))
bc7f75fa
AK		 5631 return 0;
5632
5633 {
362e20ca 5634 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data + 14);
bc7f75fa
AK		 5635 struct udphdr *udp;
5636
5637 if (ip->protocol != IPPROTO_UDP)
5638 return 0;
5639
5640 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
5641 if (ntohs(udp->dest) != 67)
5642 return 0;
5643
5644 offset = (u8 *)udp + 8 - skb->data;
5645 length = skb->len - offset;
5646 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
5647 }
5648
5649 return 0;
5650}
5651
55aa6985 5652static int __e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size)
bc7f75fa 5653{
55aa6985 5654 struct e1000_adapter *adapter = tx_ring->adapter;
bc7f75fa 5655
55aa6985 5656 netif_stop_queue(adapter->netdev);
e921eb1a 5657 /* Herbert's original patch had:
bc7f75fa 5658 * smp_mb__after_netif_stop_queue();
ad68076e
BA		 5659 * but since that doesn't exist yet, just open code it.
5660 */
bc7f75fa
AK		 5661 smp_mb();
5662
e921eb1a 5663 /* We need to check again in a case another CPU has just
ad68076e
BA		 5664 * made room available.
5665 */
55aa6985 5666 if (e1000_desc_unused(tx_ring) < size)
bc7f75fa
AK		 5667 return -EBUSY;
5668
5669 /* A reprieve! */
55aa6985 5670 netif_start_queue(adapter->netdev);
bc7f75fa
AK		 5671 ++adapter->restart_queue;
5672 return 0;
5673}
5674
55aa6985 5675static int e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size)
bc7f75fa 5676{
d821a4c4
BA		 5677 BUG_ON(size > tx_ring->count);
5678
55aa6985 5679 if (e1000_desc_unused(tx_ring) >= size)
bc7f75fa 5680 return 0;
55aa6985 5681 return __e1000_maybe_stop_tx(tx_ring, size);
bc7f75fa
AK		 5682}
5683
3b29a56d
SH		 5684static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
5685 struct net_device *netdev)
bc7f75fa
AK		 5686{
5687 struct e1000_adapter *adapter = netdev_priv(netdev);
5688 struct e1000_ring *tx_ring = adapter->tx_ring;
5689 unsigned int first;
bc7f75fa 5690 unsigned int tx_flags = 0;
e743d313 5691 unsigned int len = skb_headlen(skb);
4e6c709c
AK		 5692 unsigned int nr_frags;
5693 unsigned int mss;
bc7f75fa
AK		 5694 int count = 0;
5695 int tso;
5696 unsigned int f;
47ccd1ed 5697 __be16 protocol = vlan_get_protocol(skb);
bc7f75fa
AK		 5698
5699 if (test_bit(__E1000_DOWN, &adapter->state)) {
5700 dev_kfree_skb_any(skb);
5701 return NETDEV_TX_OK;
5702 }
5703
5704 if (skb->len <= 0) {
5705 dev_kfree_skb_any(skb);
5706 return NETDEV_TX_OK;
5707 }
5708
e921eb1a 5709 /* The minimum packet size with TCTL.PSP set is 17 bytes so
6e97c170
TD		 5710 * pad skb in order to meet this minimum size requirement
5711 */
a94d9e22
AD		 5712 if (skb_put_padto(skb, 17))
5713 return NETDEV_TX_OK;
6e97c170 5714
bc7f75fa 5715 mss = skb_shinfo(skb)->gso_size;
bc7f75fa
AK		 5716 if (mss) {
5717 u8 hdr_len;
bc7f75fa 5718
e921eb1a 5719 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
ad68076e
BA		 5720 * points to just header, pull a few bytes of payload from
5721 * frags into skb->data
5722 */
bc7f75fa 5723 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
e921eb1a 5724 /* we do this workaround for ES2LAN, but it is un-necessary,
ad68076e
BA		 5725 * avoiding it could save a lot of cycles
5726 */
4e6c709c 5727 if (skb->data_len && (hdr_len == len)) {
bc7f75fa
AK		 5728 unsigned int pull_size;
5729
a2a5b323 5730 pull_size = min_t(unsigned int, 4, skb->data_len);
bc7f75fa 5731 if (!__pskb_pull_tail(skb, pull_size)) {
44defeb3 5732 e_err("__pskb_pull_tail failed.\n");
bc7f75fa
AK		 5733 dev_kfree_skb_any(skb);
5734 return NETDEV_TX_OK;
5735 }
e743d313 5736 len = skb_headlen(skb);
bc7f75fa
AK		 5737 }
5738 }
5739
5740 /* reserve a descriptor for the offload context */
5741 if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
5742 count++;
5743 count++;
5744
d821a4c4 5745 count += DIV_ROUND_UP(len, adapter->tx_fifo_limit);
bc7f75fa
AK		 5746
5747 nr_frags = skb_shinfo(skb)->nr_frags;
5748 for (f = 0; f < nr_frags; f++)
d821a4c4
BA		 5749 count += DIV_ROUND_UP(skb_frag_size(&skb_shinfo(skb)->frags[f]),
5750 adapter->tx_fifo_limit);
bc7f75fa
AK		 5751
5752 if (adapter->hw.mac.tx_pkt_filtering)
5753 e1000_transfer_dhcp_info(adapter, skb);
5754
e921eb1a 5755 /* need: count + 2 desc gap to keep tail from touching
ad68076e
BA		 5756 * head, otherwise try next time
5757 */
55aa6985 5758 if (e1000_maybe_stop_tx(tx_ring, count + 2))
bc7f75fa 5759 return NETDEV_TX_BUSY;
bc7f75fa 5760
df8a39de 5761 if (skb_vlan_tag_present(skb)) {
bc7f75fa 5762 tx_flags |= E1000_TX_FLAGS_VLAN;
df8a39de
JP		 5763 tx_flags |= (skb_vlan_tag_get(skb) <<
5764 E1000_TX_FLAGS_VLAN_SHIFT);
bc7f75fa
AK		 5765 }
5766
5767 first = tx_ring->next_to_use;
5768
47ccd1ed 5769 tso = e1000_tso(tx_ring, skb, protocol);
bc7f75fa
AK		 5770 if (tso < 0) {
5771 dev_kfree_skb_any(skb);
bc7f75fa
AK		 5772 return NETDEV_TX_OK;
5773 }
5774
5775 if (tso)
5776 tx_flags |= E1000_TX_FLAGS_TSO;
47ccd1ed 5777 else if (e1000_tx_csum(tx_ring, skb, protocol))
bc7f75fa
AK		 5778 tx_flags |= E1000_TX_FLAGS_CSUM;
5779
e921eb1a 5780 /* Old method was to assume IPv4 packet by default if TSO was enabled.
bc7f75fa 5781 * 82571 hardware supports TSO capabilities for IPv6 as well...
ad68076e
BA		 5782 * no longer assume, we must.
5783 */
47ccd1ed 5784 if (protocol == htons(ETH_P_IP))
bc7f75fa
AK		 5785 tx_flags |= E1000_TX_FLAGS_IPV4;
5786
943146de
BG		 5787 if (unlikely(skb->no_fcs))
5788 tx_flags |= E1000_TX_FLAGS_NO_FCS;
5789
25985edc 5790 /* if count is 0 then mapping error has occurred */
d821a4c4
BA		 5791 count = e1000_tx_map(tx_ring, skb, first, adapter->tx_fifo_limit,
5792 nr_frags);
1b7719c4 5793 if (count) {
6930895d
MK		 5794 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
5795 (adapter->flags & FLAG_HAS_HW_TIMESTAMP) &&
5796 !adapter->tx_hwtstamp_skb) {
b67e1913
BA		 5797 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
5798 tx_flags |= E1000_TX_FLAGS_HWTSTAMP;
5799 adapter->tx_hwtstamp_skb = skb_get(skb);
59c871c5 5800 adapter->tx_hwtstamp_start = jiffies;
b67e1913
BA		 5801 schedule_work(&adapter->tx_hwtstamp_work);
5802 } else {
5803 skb_tx_timestamp(skb);
5804 }
80be3129 5805
3f0cfa3b 5806 netdev_sent_queue(netdev, skb->len);
55aa6985 5807 e1000_tx_queue(tx_ring, tx_flags, count);
1b7719c4 5808 /* Make sure there is space in the ring for the next send. */
d821a4c4
BA		 5809 e1000_maybe_stop_tx(tx_ring,
5810 (MAX_SKB_FRAGS *
5811 DIV_ROUND_UP(PAGE_SIZE,
5812 adapter->tx_fifo_limit) + 2));
472f31f5
FW		 5813
5814 if (!skb->xmit_more ||
5815 netif_xmit_stopped(netdev_get_tx_queue(netdev, 0))) {
5816 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
5817 e1000e_update_tdt_wa(tx_ring,
5818 tx_ring->next_to_use);
5819 else
5820 writel(tx_ring->next_to_use, tx_ring->tail);
5821
5822 /* we need this if more than one processor can write
5823 * to our tail at a time, it synchronizes IO on
5824 *IA64/Altix systems
5825 */
5826 mmiowb();
5827 }
1b7719c4 5828 } else {
bc7f75fa 5829 dev_kfree_skb_any(skb);
1b7719c4
AD		 5830 tx_ring->buffer_info[first].time_stamp = 0;
5831 tx_ring->next_to_use = first;
bc7f75fa
AK		 5832 }
5833
bc7f75fa
AK		 5834 return NETDEV_TX_OK;
5835}
5836
5837/**
5838 * e1000_tx_timeout - Respond to a Tx Hang
5839 * @netdev: network interface device structure
5840 **/
5841static void e1000_tx_timeout(struct net_device *netdev)
5842{
5843 struct e1000_adapter *adapter = netdev_priv(netdev);
5844
5845 /* Do the reset outside of interrupt context */
5846 adapter->tx_timeout_count++;
5847 schedule_work(&adapter->reset_task);
5848}
5849
5850static void e1000_reset_task(struct work_struct *work)
5851{
5852 struct e1000_adapter *adapter;
5853 adapter = container_of(work, struct e1000_adapter, reset_task);
5854
615b32af
JB		 5855 /* don't run the task if already down */
5856 if (test_bit(__E1000_DOWN, &adapter->state))
5857 return;
5858
12d43f7d 5859 if (!(adapter->flags & FLAG_RESTART_NOW)) {
affa9dfb 5860 e1000e_dump(adapter);
12d43f7d 5861 e_err("Reset adapter unexpectedly\n");
affa9dfb 5862 }
bc7f75fa
AK		 5863 e1000e_reinit_locked(adapter);
5864}
5865
5866/**
67fd4fcb 5867 * e1000_get_stats64 - Get System Network Statistics
bc7f75fa 5868 * @netdev: network interface device structure
67fd4fcb 5869 * @stats: rtnl_link_stats64 pointer
bc7f75fa
AK		 5870 *
5871 * Returns the address of the device statistics structure.
bc7f75fa 5872 **/
67fd4fcb 5873struct rtnl_link_stats64 *e1000e_get_stats64(struct net_device *netdev,
66501f56 5874 struct rtnl_link_stats64 *stats)
bc7f75fa 5875{
67fd4fcb
JK		 5876 struct e1000_adapter *adapter = netdev_priv(netdev);
5877
5878 memset(stats, 0, sizeof(struct rtnl_link_stats64));
5879 spin_lock(&adapter->stats64_lock);
5880 e1000e_update_stats(adapter);
5881 /* Fill out the OS statistics structure */
5882 stats->rx_bytes = adapter->stats.gorc;
5883 stats->rx_packets = adapter->stats.gprc;
5884 stats->tx_bytes = adapter->stats.gotc;
5885 stats->tx_packets = adapter->stats.gptc;
5886 stats->multicast = adapter->stats.mprc;
5887 stats->collisions = adapter->stats.colc;
5888
5889 /* Rx Errors */
5890
e921eb1a 5891 /* RLEC on some newer hardware can be incorrect so build
67fd4fcb
JK		 5892 * our own version based on RUC and ROC
5893 */
5894 stats->rx_errors = adapter->stats.rxerrc +
f0ff4398
BA		 5895 adapter->stats.crcerrs + adapter->stats.algnerrc +
5896 adapter->stats.ruc + adapter->stats.roc + adapter->stats.cexterr;
5897 stats->rx_length_errors = adapter->stats.ruc + adapter->stats.roc;
67fd4fcb
JK		 5898 stats->rx_crc_errors = adapter->stats.crcerrs;
5899 stats->rx_frame_errors = adapter->stats.algnerrc;
5900 stats->rx_missed_errors = adapter->stats.mpc;
5901
5902 /* Tx Errors */
f0ff4398 5903 stats->tx_errors = adapter->stats.ecol + adapter->stats.latecol;
67fd4fcb
JK		 5904 stats->tx_aborted_errors = adapter->stats.ecol;
5905 stats->tx_window_errors = adapter->stats.latecol;
5906 stats->tx_carrier_errors = adapter->stats.tncrs;
5907
5908 /* Tx Dropped needs to be maintained elsewhere */
5909
5910 spin_unlock(&adapter->stats64_lock);
5911 return stats;
bc7f75fa
AK		 5912}
5913
5914/**
5915 * e1000_change_mtu - Change the Maximum Transfer Unit
5916 * @netdev: network interface device structure
5917 * @new_mtu: new value for maximum frame size
5918 *
5919 * Returns 0 on success, negative on failure
5920 **/
5921static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
5922{
5923 struct e1000_adapter *adapter = netdev_priv(netdev);
8084b86d 5924 int max_frame = new_mtu + VLAN_ETH_HLEN + ETH_FCS_LEN;
bc7f75fa 5925
2adc55c9 5926 /* Jumbo frame support */
8084b86d 5927 if ((max_frame > (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)) &&
2e1706f2
BA		 5928 !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
5929 e_err("Jumbo Frames not supported.\n");
5930 return -EINVAL;
bc7f75fa
AK		 5931 }
5932
2adc55c9 5933 /* Supported frame sizes */
8084b86d 5934 if ((new_mtu < (VLAN_ETH_ZLEN + ETH_FCS_LEN)) ||
2adc55c9
BA		 5935 (max_frame > adapter->max_hw_frame_size)) {
5936 e_err("Unsupported MTU setting\n");
bc7f75fa
AK		 5937 return -EINVAL;
5938 }
5939
2fbe4526
BA		 5940 /* Jumbo frame workaround on 82579 and newer requires CRC be stripped */
5941 if ((adapter->hw.mac.type >= e1000_pch2lan) &&
a1ce6473
BA		 5942 !(adapter->flags2 & FLAG2_CRC_STRIPPING) &&
5943 (new_mtu > ETH_DATA_LEN)) {
2fbe4526 5944 e_err("Jumbo Frames not supported on this device when CRC stripping is disabled.\n");
a1ce6473
BA		 5945 return -EINVAL;
5946 }
5947
bc7f75fa 5948 while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
1bba4386 5949 usleep_range(1000, 2000);
610c9928 5950 /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
318a94d6 5951 adapter->max_frame_size = max_frame;
610c9928
BA		 5952 e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5953 netdev->mtu = new_mtu;
63eb48f1
DE		 5954
5955 pm_runtime_get_sync(netdev->dev.parent);
5956
bc7f75fa 5957 if (netif_running(netdev))
28002099 5958 e1000e_down(adapter, true);
bc7f75fa 5959
e921eb1a 5960 /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
bc7f75fa
AK		 5961 * means we reserve 2 more, this pushes us to allocate from the next
5962 * larger slab size.
ad68076e 5963 * i.e. RXBUFFER_2048 --> size-4096 slab
97ac8cae
BA		 5964 * However with the new *_jumbo_rx* routines, jumbo receives will use
5965 * fragmented skbs
ad68076e 5966 */
bc7f75fa 5967
9926146b 5968 if (max_frame <= 2048)
bc7f75fa
AK		 5969 adapter->rx_buffer_len = 2048;
5970 else
5971 adapter->rx_buffer_len = 4096;
5972
5973 /* adjust allocation if LPE protects us, and we aren't using SBP */
8084b86d
AD		 5974 if (max_frame <= (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN))
5975 adapter->rx_buffer_len = VLAN_ETH_FRAME_LEN + ETH_FCS_LEN;
bc7f75fa 5976
bc7f75fa
AK		 5977 if (netif_running(netdev))
5978 e1000e_up(adapter);
5979 else
5980 e1000e_reset(adapter);
5981
63eb48f1
DE		 5982 pm_runtime_put_sync(netdev->dev.parent);
5983
bc7f75fa
AK		 5984 clear_bit(__E1000_RESETTING, &adapter->state);
5985
5986 return 0;
5987}
5988
5989static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
5990 int cmd)
5991{
5992 struct e1000_adapter *adapter = netdev_priv(netdev);
5993 struct mii_ioctl_data *data = if_mii(ifr);
bc7f75fa 5994
318a94d6 5995 if (adapter->hw.phy.media_type != e1000_media_type_copper)
bc7f75fa
AK		 5996 return -EOPNOTSUPP;
5997
5998 switch (cmd) {
5999 case SIOCGMIIPHY:
6000 data->phy_id = adapter->hw.phy.addr;
6001 break;
6002 case SIOCGMIIREG:
b16a002e
BA		 6003 e1000_phy_read_status(adapter);
6004
7c25769f
BA		 6005 switch (data->reg_num & 0x1F) {
6006 case MII_BMCR:
6007 data->val_out = adapter->phy_regs.bmcr;
6008 break;
6009 case MII_BMSR:
6010 data->val_out = adapter->phy_regs.bmsr;
6011 break;
6012 case MII_PHYSID1:
6013 data->val_out = (adapter->hw.phy.id >> 16);
6014 break;
6015 case MII_PHYSID2:
6016 data->val_out = (adapter->hw.phy.id & 0xFFFF);
6017 break;
6018 case MII_ADVERTISE:
6019 data->val_out = adapter->phy_regs.advertise;
6020 break;
6021 case MII_LPA:
6022 data->val_out = adapter->phy_regs.lpa;
6023 break;
6024 case MII_EXPANSION:
6025 data->val_out = adapter->phy_regs.expansion;
6026 break;
6027 case MII_CTRL1000:
6028 data->val_out = adapter->phy_regs.ctrl1000;
6029 break;
6030 case MII_STAT1000:
6031 data->val_out = adapter->phy_regs.stat1000;
6032 break;
6033 case MII_ESTATUS:
6034 data->val_out = adapter->phy_regs.estatus;
6035 break;
6036 default:
bc7f75fa
AK		 6037 return -EIO;
6038 }
bc7f75fa
AK		 6039 break;
6040 case SIOCSMIIREG:
6041 default:
6042 return -EOPNOTSUPP;
6043 }
6044 return 0;
6045}
6046
b67e1913
BA		 6047/**
6048 * e1000e_hwtstamp_ioctl - control hardware time stamping
6049 * @netdev: network interface device structure
6050 * @ifreq: interface request
6051 *
6052 * Outgoing time stamping can be enabled and disabled. Play nice and
6053 * disable it when requested, although it shouldn't cause any overhead
6054 * when no packet needs it. At most one packet in the queue may be
6055 * marked for time stamping, otherwise it would be impossible to tell
6056 * for sure to which packet the hardware time stamp belongs.
6057 *
6058 * Incoming time stamping has to be configured via the hardware filters.
6059 * Not all combinations are supported, in particular event type has to be
6060 * specified. Matching the kind of event packet is not supported, with the
6061 * exception of "all V2 events regardless of level 2 or 4".
6062 **/
4e8cff64 6063static int e1000e_hwtstamp_set(struct net_device *netdev, struct ifreq *ifr)
b67e1913
BA		 6064{
6065 struct e1000_adapter *adapter = netdev_priv(netdev);
6066 struct hwtstamp_config config;
6067 int ret_val;
6068
6069 if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
6070 return -EFAULT;
6071
62d7e3a2 6072 ret_val = e1000e_config_hwtstamp(adapter, &config);
b67e1913
BA		 6073 if (ret_val)
6074 return ret_val;
6075
d89777bf
BA		 6076 switch (config.rx_filter) {
6077 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
6078 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
6079 case HWTSTAMP_FILTER_PTP_V2_SYNC:
6080 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
6081 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
6082 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
6083 /* With V2 type filters which specify a Sync or Delay Request,
6084 * Path Delay Request/Response messages are also time stamped
6085 * by hardware so notify the caller the requested packets plus
6086 * some others are time stamped.
6087 */
6088 config.rx_filter = HWTSTAMP_FILTER_SOME;
6089 break;
6090 default:
6091 break;
6092 }
6093
b67e1913
BA		 6094 return copy_to_user(ifr->ifr_data, &config,
6095 sizeof(config)) ? -EFAULT : 0;
6096}
6097
4e8cff64
BH		 6098static int e1000e_hwtstamp_get(struct net_device *netdev, struct ifreq *ifr)
6099{
6100 struct e1000_adapter *adapter = netdev_priv(netdev);
6101
6102 return copy_to_user(ifr->ifr_data, &adapter->hwtstamp_config,
6103 sizeof(adapter->hwtstamp_config)) ? -EFAULT : 0;
6104}
6105
bc7f75fa
AK		 6106static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
6107{
6108 switch (cmd) {
6109 case SIOCGMIIPHY:
6110 case SIOCGMIIREG:
6111 case SIOCSMIIREG:
6112 return e1000_mii_ioctl(netdev, ifr, cmd);
b67e1913 6113 case SIOCSHWTSTAMP:
4e8cff64
BH		 6114 return e1000e_hwtstamp_set(netdev, ifr);
6115 case SIOCGHWTSTAMP:
6116 return e1000e_hwtstamp_get(netdev, ifr);
bc7f75fa
AK		 6117 default:
6118 return -EOPNOTSUPP;
6119 }
6120}
6121
a4f58f54
BA		 6122static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc)
6123{
6124 struct e1000_hw *hw = &adapter->hw;
74f350ee 6125 u32 i, mac_reg, wuc;
2b6b168d 6126 u16 phy_reg, wuc_enable;
70806a7f 6127 int retval;
a4f58f54
BA		 6128
6129 /* copy MAC RARs to PHY RARs */
d3738bb8 6130 e1000_copy_rx_addrs_to_phy_ich8lan(hw);
a4f58f54 6131
2b6b168d
BA		 6132 retval = hw->phy.ops.acquire(hw);
6133 if (retval) {
6134 e_err("Could not acquire PHY\n");
6135 return retval;
6136 }
6137
6138 /* Enable access to wakeup registers on and set page to BM_WUC_PAGE */
6139 retval = e1000_enable_phy_wakeup_reg_access_bm(hw, &wuc_enable);
6140 if (retval)
75ce1532 6141 goto release;
2b6b168d
BA		 6142
6143 /* copy MAC MTA to PHY MTA - only needed for pchlan */
a4f58f54
BA		 6144 for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) {
6145 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i);
2b6b168d
BA		 6146 hw->phy.ops.write_reg_page(hw, BM_MTA(i),
6147 (u16)(mac_reg & 0xFFFF));
6148 hw->phy.ops.write_reg_page(hw, BM_MTA(i) + 1,
6149 (u16)((mac_reg >> 16) & 0xFFFF));
a4f58f54
BA		 6150 }
6151
6152 /* configure PHY Rx Control register */
2b6b168d 6153 hw->phy.ops.read_reg_page(&adapter->hw, BM_RCTL, &phy_reg);
a4f58f54
BA		 6154 mac_reg = er32(RCTL);
6155 if (mac_reg & E1000_RCTL_UPE)
6156 phy_reg |= BM_RCTL_UPE;
6157 if (mac_reg & E1000_RCTL_MPE)
6158 phy_reg |= BM_RCTL_MPE;
6159 phy_reg &= ~(BM_RCTL_MO_MASK);
6160 if (mac_reg & E1000_RCTL_MO_3)
6161 phy_reg |= (((mac_reg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT)
17e813ec 6162 << BM_RCTL_MO_SHIFT);
a4f58f54
BA		 6163 if (mac_reg & E1000_RCTL_BAM)
6164 phy_reg |= BM_RCTL_BAM;
6165 if (mac_reg & E1000_RCTL_PMCF)
6166 phy_reg |= BM_RCTL_PMCF;
6167 mac_reg = er32(CTRL);
6168 if (mac_reg & E1000_CTRL_RFCE)
6169 phy_reg |= BM_RCTL_RFCE;
2b6b168d 6170 hw->phy.ops.write_reg_page(&adapter->hw, BM_RCTL, phy_reg);
a4f58f54 6171
74f350ee
DE		 6172 wuc = E1000_WUC_PME_EN;
6173 if (wufc & (E1000_WUFC_MAG | E1000_WUFC_LNKC))
6174 wuc |= E1000_WUC_APME;
6175
a4f58f54
BA		 6176 /* enable PHY wakeup in MAC register */
6177 ew32(WUFC, wufc);
74f350ee
DE		 6178 ew32(WUC, (E1000_WUC_PHY_WAKE | E1000_WUC_APMPME |
6179 E1000_WUC_PME_STATUS | wuc));
a4f58f54
BA		 6180
6181 /* configure and enable PHY wakeup in PHY registers */
2b6b168d 6182 hw->phy.ops.write_reg_page(&adapter->hw, BM_WUFC, wufc);
74f350ee 6183 hw->phy.ops.write_reg_page(&adapter->hw, BM_WUC, wuc);
a4f58f54
BA		 6184
6185 /* activate PHY wakeup */
2b6b168d
BA		 6186 wuc_enable |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT;
6187 retval = e1000_disable_phy_wakeup_reg_access_bm(hw, &wuc_enable);
a4f58f54
BA		 6188 if (retval)
6189 e_err("Could not set PHY Host Wakeup bit\n");
75ce1532 6190release:
94d8186a 6191 hw->phy.ops.release(hw);
a4f58f54
BA		 6192
6193 return retval;
6194}
6195
2a7e19af
DE		 6196static void e1000e_flush_lpic(struct pci_dev *pdev)
6197{
6198 struct net_device *netdev = pci_get_drvdata(pdev);
6199 struct e1000_adapter *adapter = netdev_priv(netdev);
6200 struct e1000_hw *hw = &adapter->hw;
6201 u32 ret_val;
6202
6203 pm_runtime_get_sync(netdev->dev.parent);
6204
6205 ret_val = hw->phy.ops.acquire(hw);
6206 if (ret_val)
6207 goto fl_out;
6208
6209 pr_info("EEE TX LPI TIMER: %08X\n",
6210 er32(LPIC) >> E1000_LPIC_LPIET_SHIFT);
6211
6212 hw->phy.ops.release(hw);
6213
6214fl_out:
6215 pm_runtime_put_sync(netdev->dev.parent);
6216}
6217
28002099 6218static int e1000e_pm_freeze(struct device *dev)
bc7f75fa 6219{
28002099 6220 struct net_device *netdev = pci_get_drvdata(to_pci_dev(dev));
bc7f75fa 6221 struct e1000_adapter *adapter = netdev_priv(netdev);
bc7f75fa
AK		 6222
6223 netif_device_detach(netdev);
6224
6225 if (netif_running(netdev)) {
bb9e44d0
BA		 6226 int count = E1000_CHECK_RESET_COUNT;
6227
6228 while (test_bit(__E1000_RESETTING, &adapter->state) && count--)
6229 usleep_range(10000, 20000);
6230
bc7f75fa 6231 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
28002099
DE		 6232
6233 /* Quiesce the device without resetting the hardware */
6234 e1000e_down(adapter, false);
bc7f75fa
AK		 6235 e1000_free_irq(adapter);
6236 }
4662e82b 6237 e1000e_reset_interrupt_capability(adapter);
bc7f75fa 6238
28002099
DE		 6239 /* Allow time for pending master requests to run */
6240 e1000e_disable_pcie_master(&adapter->hw);
6241
6242 return 0;
6243}
6244
6245static int __e1000_shutdown(struct pci_dev *pdev, bool runtime)
6246{
6247 struct net_device *netdev = pci_get_drvdata(pdev);
6248 struct e1000_adapter *adapter = netdev_priv(netdev);
6249 struct e1000_hw *hw = &adapter->hw;
6250 u32 ctrl, ctrl_ext, rctl, status;
6251 /* Runtime suspend should only enable wakeup for link changes */
6252 u32 wufc = runtime ? E1000_WUFC_LNKC : adapter->wol;
6253 int retval = 0;
6254
bc7f75fa
AK		 6255 status = er32(STATUS);
6256 if (status & E1000_STATUS_LU)
6257 wufc &= ~E1000_WUFC_LNKC;
6258
6259 if (wufc) {
6260 e1000_setup_rctl(adapter);
ef9b965a 6261 e1000e_set_rx_mode(netdev);
bc7f75fa
AK		 6262
6263 /* turn on all-multi mode if wake on multicast is enabled */
6264 if (wufc & E1000_WUFC_MC) {
6265 rctl = er32(RCTL);
6266 rctl |= E1000_RCTL_MPE;
6267 ew32(RCTL, rctl);
6268 }
6269
6270 ctrl = er32(CTRL);
a4f58f54
BA		 6271 ctrl |= E1000_CTRL_ADVD3WUC;
6272 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP))
6273 ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT;
bc7f75fa
AK		 6274 ew32(CTRL, ctrl);
6275
318a94d6
JK		 6276 if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
6277 adapter->hw.phy.media_type ==
6278 e1000_media_type_internal_serdes) {
bc7f75fa
AK		 6279 /* keep the laser running in D3 */
6280 ctrl_ext = er32(CTRL_EXT);
93a23f48 6281 ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA;
bc7f75fa
AK		 6282 ew32(CTRL_EXT, ctrl_ext);
6283 }
6284
63eb48f1
DE		 6285 if (!runtime)
6286 e1000e_power_up_phy(adapter);
6287
97ac8cae 6288 if (adapter->flags & FLAG_IS_ICH)
99730e4c 6289 e1000_suspend_workarounds_ich8lan(&adapter->hw);
97ac8cae 6290
82776a4b 6291 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
a4f58f54
BA		 6292 /* enable wakeup by the PHY */
6293 retval = e1000_init_phy_wakeup(adapter, wufc);
6294 if (retval)
6295 return retval;
6296 } else {
6297 /* enable wakeup by the MAC */
6298 ew32(WUFC, wufc);
6299 ew32(WUC, E1000_WUC_PME_EN);
6300 }
bc7f75fa
AK		 6301 } else {
6302 ew32(WUC, 0);
6303 ew32(WUFC, 0);
28002099
DE		 6304
6305 e1000_power_down_phy(adapter);
bc7f75fa
AK		 6306 }
6307
74f350ee 6308 if (adapter->hw.phy.type == e1000_phy_igp_3) {
bc7f75fa 6309 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
79849ebc
DE		 6310 } else if ((hw->mac.type == e1000_pch_lpt) ||
6311 (hw->mac.type == e1000_pch_spt)) {
74f350ee
DE		 6312 if (!(wufc & (E1000_WUFC_EX | E1000_WUFC_MC | E1000_WUFC_BC)))
6313 /* ULP does not support wake from unicast, multicast
6314 * or broadcast.
6315 */
6316 retval = e1000_enable_ulp_lpt_lp(hw, !runtime);
6317
6318 if (retval)
6319 return retval;
6320 }
6321
f5ac7445
RA		 6322 /* Ensure that the appropriate bits are set in LPI_CTRL
6323 * for EEE in Sx
6324 */
6325 if ((hw->phy.type >= e1000_phy_i217) &&
6326 adapter->eee_advert && hw->dev_spec.ich8lan.eee_lp_ability) {
6327 u16 lpi_ctrl = 0;
6328
6329 retval = hw->phy.ops.acquire(hw);
6330 if (!retval) {
6331 retval = e1e_rphy_locked(hw, I82579_LPI_CTRL,
6332 &lpi_ctrl);
6333 if (!retval) {
6334 if (adapter->eee_advert &
6335 hw->dev_spec.ich8lan.eee_lp_ability &
6336 I82579_EEE_100_SUPPORTED)
6337 lpi_ctrl |= I82579_LPI_CTRL_100_ENABLE;
6338 if (adapter->eee_advert &
6339 hw->dev_spec.ich8lan.eee_lp_ability &
6340 I82579_EEE_1000_SUPPORTED)
6341 lpi_ctrl |= I82579_LPI_CTRL_1000_ENABLE;
6342
6343 retval = e1e_wphy_locked(hw, I82579_LPI_CTRL,
6344 lpi_ctrl);
6345 }
6346 }
6347 hw->phy.ops.release(hw);
6348 }
bc7f75fa 6349
e921eb1a 6350 /* Release control of h/w to f/w. If f/w is AMT enabled, this
ad68076e
BA		 6351 * would have already happened in close and is redundant.
6352 */
31dbe5b4 6353 e1000e_release_hw_control(adapter);
bc7f75fa 6354
24b41c97
DN		 6355 pci_clear_master(pdev);
6356
e921eb1a 6357 /* The pci-e switch on some quad port adapters will report a
005cbdfc
AD		 6358 * correctable error when the MAC transitions from D0 to D3. To
6359 * prevent this we need to mask off the correctable errors on the
6360 * downstream port of the pci-e switch.
e8c254c5
LZ		 6361 *
6362 * We don't have the associated upstream bridge while assigning
6363 * the PCI device into guest. For example, the KVM on power is
6364 * one of the cases.
005cbdfc
AD		 6365 */
6366 if (adapter->flags & FLAG_IS_QUAD_PORT) {
6367 struct pci_dev *us_dev = pdev->bus->self;
005cbdfc
AD		 6368 u16 devctl;
6369
e8c254c5
LZ		 6370 if (!us_dev)
6371 return 0;
6372
f8c0fcac
JL		 6373 pcie_capability_read_word(us_dev, PCI_EXP_DEVCTL, &devctl);
6374 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL,
6375 (devctl & ~PCI_EXP_DEVCTL_CERE));
005cbdfc 6376
66148bab
KK		 6377 pci_save_state(pdev);
6378 pci_prepare_to_sleep(pdev);
005cbdfc 6379
f8c0fcac 6380 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL, devctl);
005cbdfc 6381 }
66148bab
KK		 6382
6383 return 0;
bc7f75fa
AK		 6384}
6385
13129d9b 6386/**
beb0a152 6387 * __e1000e_disable_aspm - Disable ASPM states
13129d9b
CW		 6388 * @pdev: pointer to PCI device struct
6389 * @state: bit-mask of ASPM states to disable
beb0a152 6390 * @locked: indication if this context holds pci_bus_sem locked.
13129d9b
CW		 6391 *
6392 * Some devices *must* have certain ASPM states disabled per hardware errata.
6393 **/
beb0a152 6394static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state, int locked)
6f461f6c 6395{
13129d9b
CW		 6396 struct pci_dev *parent = pdev->bus->self;
6397 u16 aspm_dis_mask = 0;
6398 u16 pdev_aspmc, parent_aspmc;
6399
6400 switch (state) {
6401 case PCIE_LINK_STATE_L0S:
6402 case PCIE_LINK_STATE_L0S | PCIE_LINK_STATE_L1:
6403 aspm_dis_mask |= PCI_EXP_LNKCTL_ASPM_L0S;
6404 /* fall-through - can't have L1 without L0s */
6405 case PCIE_LINK_STATE_L1:
6406 aspm_dis_mask |= PCI_EXP_LNKCTL_ASPM_L1;
6407 break;
6408 default:
6409 return;
6410 }
6411
6412 pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &pdev_aspmc);
6413 pdev_aspmc &= PCI_EXP_LNKCTL_ASPMC;
6414
6415 if (parent) {
6416 pcie_capability_read_word(parent, PCI_EXP_LNKCTL,
6417 &parent_aspmc);
6418 parent_aspmc &= PCI_EXP_LNKCTL_ASPMC;
6419 }
6420
6421 /* Nothing to do if the ASPM states to be disabled already are */
6422 if (!(pdev_aspmc & aspm_dis_mask) &&
6423 (!parent || !(parent_aspmc & aspm_dis_mask)))
6424 return;
6425
6426 dev_info(&pdev->dev, "Disabling ASPM %s %s\n",
6427 (aspm_dis_mask & pdev_aspmc & PCI_EXP_LNKCTL_ASPM_L0S) ?
6428 "L0s" : "",
6429 (aspm_dis_mask & pdev_aspmc & PCI_EXP_LNKCTL_ASPM_L1) ?
6430 "L1" : "");
6431
6432#ifdef CONFIG_PCIEASPM
beb0a152
YL		 6433 if (locked)
6434 pci_disable_link_state_locked(pdev, state);
6435 else
6436 pci_disable_link_state(pdev, state);
ffe0b2ff 6437
13129d9b
CW		 6438 /* Double-check ASPM control. If not disabled by the above, the
6439 * BIOS is preventing that from happening (or CONFIG_PCIEASPM is
6440 * not enabled); override by writing PCI config space directly.
6441 */
6442 pcie_capability_read_word(pdev, PCI_EXP_LNKCTL, &pdev_aspmc);
6443 pdev_aspmc &= PCI_EXP_LNKCTL_ASPMC;
6444
6445 if (!(aspm_dis_mask & pdev_aspmc))
6446 return;
6447#endif
ffe0b2ff 6448
e921eb1a 6449 /* Both device and parent should have the same ASPM setting.
6f461f6c 6450 * Disable ASPM in downstream component first and then upstream.
1eae4eb2 6451 */
13129d9b 6452 pcie_capability_clear_word(pdev, PCI_EXP_LNKCTL, aspm_dis_mask);
6f461f6c 6453
13129d9b
CW		 6454 if (parent)
6455 pcie_capability_clear_word(parent, PCI_EXP_LNKCTL,
6456 aspm_dis_mask);
1eae4eb2
AK		 6457}
6458
beb0a152
YL		 6459/**
6460 * e1000e_disable_aspm - Disable ASPM states.
6461 * @pdev: pointer to PCI device struct
6462 * @state: bit-mask of ASPM states to disable
6463 *
6464 * This function acquires the pci_bus_sem!
6465 * Some devices *must* have certain ASPM states disabled per hardware errata.
6466 **/
6467static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
6468{
6469 __e1000e_disable_aspm(pdev, state, 0);
6470}
6471
6472/**
6473 * e1000e_disable_aspm_locked Disable ASPM states.
6474 * @pdev: pointer to PCI device struct
6475 * @state: bit-mask of ASPM states to disable
6476 *
6477 * This function must be called with pci_bus_sem acquired!
6478 * Some devices *must* have certain ASPM states disabled per hardware errata.
6479 **/
6480static void e1000e_disable_aspm_locked(struct pci_dev *pdev, u16 state)
6481{
6482 __e1000e_disable_aspm(pdev, state, 1);
6483}
6484
aa338601 6485#ifdef CONFIG_PM
23606cf5 6486static int __e1000_resume(struct pci_dev *pdev)
bc7f75fa
AK		 6487{
6488 struct net_device *netdev = pci_get_drvdata(pdev);
6489 struct e1000_adapter *adapter = netdev_priv(netdev);
6490 struct e1000_hw *hw = &adapter->hw;
78cd29d5 6491 u16 aspm_disable_flag = 0;
bc7f75fa 6492
78cd29d5
BA		 6493 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S)
6494 aspm_disable_flag = PCIE_LINK_STATE_L0S;
6495 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
6496 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6497 if (aspm_disable_flag)
2758f9ed 6498 e1000e_disable_aspm(pdev, aspm_disable_flag);
78cd29d5 6499
66148bab 6500 pci_set_master(pdev);
6e4f6f6b 6501
2fbe4526 6502 if (hw->mac.type >= e1000_pch2lan)
99730e4c
BA		 6503 e1000_resume_workarounds_pchlan(&adapter->hw);
6504
bc7f75fa 6505 e1000e_power_up_phy(adapter);
a4f58f54
BA		 6506
6507 /* report the system wakeup cause from S3/S4 */
6508 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
6509 u16 phy_data;
6510
6511 e1e_rphy(&adapter->hw, BM_WUS, &phy_data);
6512 if (phy_data) {
6513 e_info("PHY Wakeup cause - %s\n",
17e813ec
BA		 6514 phy_data & E1000_WUS_EX ? "Unicast Packet" :
6515 phy_data & E1000_WUS_MC ? "Multicast Packet" :
6516 phy_data & E1000_WUS_BC ? "Broadcast Packet" :
6517 phy_data & E1000_WUS_MAG ? "Magic Packet" :
6518 phy_data & E1000_WUS_LNKC ?
6519 "Link Status Change" : "other");
a4f58f54
BA		 6520 }
6521 e1e_wphy(&adapter->hw, BM_WUS, ~0);
6522 } else {
6523 u32 wus = er32(WUS);
6cf08d1c 6524
a4f58f54
BA		 6525 if (wus) {
6526 e_info("MAC Wakeup cause - %s\n",
17e813ec
BA		 6527 wus & E1000_WUS_EX ? "Unicast Packet" :
6528 wus & E1000_WUS_MC ? "Multicast Packet" :
6529 wus & E1000_WUS_BC ? "Broadcast Packet" :
6530 wus & E1000_WUS_MAG ? "Magic Packet" :
6531 wus & E1000_WUS_LNKC ? "Link Status Change" :
6532 "other");
a4f58f54
BA		 6533 }
6534 ew32(WUS, ~0);
6535 }
6536
bc7f75fa 6537 e1000e_reset(adapter);
bc7f75fa 6538
cd791618 6539 e1000_init_manageability_pt(adapter);
bc7f75fa 6540
e921eb1a 6541 /* If the controller has AMT, do not set DRV_LOAD until the interface
bc7f75fa 6542 * is up. For all other cases, let the f/w know that the h/w is now
ad68076e
BA		 6543 * under the control of the driver.
6544 */
c43bc57e 6545 if (!(adapter->flags & FLAG_HAS_AMT))
31dbe5b4 6546 e1000e_get_hw_control(adapter);
bc7f75fa
AK		 6547
6548 return 0;
6549}
23606cf5 6550
3e7986f6 6551#ifdef CONFIG_PM_SLEEP
28002099
DE		 6552static int e1000e_pm_thaw(struct device *dev)
6553{
6554 struct net_device *netdev = pci_get_drvdata(to_pci_dev(dev));
6555 struct e1000_adapter *adapter = netdev_priv(netdev);
6556
6557 e1000e_set_interrupt_capability(adapter);
6558 if (netif_running(netdev)) {
6559 u32 err = e1000_request_irq(adapter);
6560
6561 if (err)
6562 return err;
6563
6564 e1000e_up(adapter);
6565 }
6566
6567 netif_device_attach(netdev);
6568
6569 return 0;
6570}
6571
28002099 6572static int e1000e_pm_suspend(struct device *dev)
a0340162
RW		 6573{
6574 struct pci_dev *pdev = to_pci_dev(dev);
a0340162 6575
2a7e19af
DE		 6576 e1000e_flush_lpic(pdev);
6577
28002099
DE		 6578 e1000e_pm_freeze(dev);
6579
66148bab 6580 return __e1000_shutdown(pdev, false);
a0340162
RW		 6581}
6582
28002099 6583static int e1000e_pm_resume(struct device *dev)
23606cf5
RW		 6584{
6585 struct pci_dev *pdev = to_pci_dev(dev);
28002099 6586 int rc;
23606cf5 6587
28002099
DE		 6588 rc = __e1000_resume(pdev);
6589 if (rc)
6590 return rc;
23606cf5 6591
28002099 6592 return e1000e_pm_thaw(dev);
23606cf5 6593}
38a529b5 6594#endif /* CONFIG_PM_SLEEP */
a0340162 6595
63eb48f1 6596static int e1000e_pm_runtime_idle(struct device *dev)
a0340162
RW		 6597{
6598 struct pci_dev *pdev = to_pci_dev(dev);
6599 struct net_device *netdev = pci_get_drvdata(pdev);
6600 struct e1000_adapter *adapter = netdev_priv(netdev);
2116bc25 6601 u16 eee_lp;
a0340162 6602
2116bc25
DE		 6603 eee_lp = adapter->hw.dev_spec.ich8lan.eee_lp_ability;
6604
6605 if (!e1000e_has_link(adapter)) {
6606 adapter->hw.dev_spec.ich8lan.eee_lp_ability = eee_lp;
63eb48f1 6607 pm_schedule_suspend(dev, 5 * MSEC_PER_SEC);
2116bc25 6608 }
a0340162 6609
63eb48f1 6610 return -EBUSY;
a0340162
RW		 6611}
6612
63eb48f1 6613static int e1000e_pm_runtime_resume(struct device *dev)
a0340162
RW		 6614{
6615 struct pci_dev *pdev = to_pci_dev(dev);
6616 struct net_device *netdev = pci_get_drvdata(pdev);
6617 struct e1000_adapter *adapter = netdev_priv(netdev);
63eb48f1 6618 int rc;
a0340162 6619
63eb48f1
DE		 6620 rc = __e1000_resume(pdev);
6621 if (rc)
6622 return rc;
a0340162 6623
63eb48f1 6624 if (netdev->flags & IFF_UP)
386164d9 6625 e1000e_up(adapter);
a0340162 6626
63eb48f1 6627 return rc;
a0340162 6628}
23606cf5 6629
63eb48f1 6630static int e1000e_pm_runtime_suspend(struct device *dev)
23606cf5
RW		 6631{
6632 struct pci_dev *pdev = to_pci_dev(dev);
6633 struct net_device *netdev = pci_get_drvdata(pdev);
6634 struct e1000_adapter *adapter = netdev_priv(netdev);
6635
63eb48f1
DE		 6636 if (netdev->flags & IFF_UP) {
6637 int count = E1000_CHECK_RESET_COUNT;
6638
6639 while (test_bit(__E1000_RESETTING, &adapter->state) && count--)
6640 usleep_range(10000, 20000);
23606cf5 6641
63eb48f1
DE		 6642 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
6643
6644 /* Down the device without resetting the hardware */
6645 e1000e_down(adapter, false);
6646 }
6647
6648 if (__e1000_shutdown(pdev, true)) {
6649 e1000e_pm_runtime_resume(dev);
6650 return -EBUSY;
6651 }
6652
6653 return 0;
23606cf5 6654}
aa338601 6655#endif /* CONFIG_PM */
bc7f75fa
AK		 6656
6657static void e1000_shutdown(struct pci_dev *pdev)
6658{
2a7e19af
DE		 6659 e1000e_flush_lpic(pdev);
6660
28002099
DE		 6661 e1000e_pm_freeze(&pdev->dev);
6662
66148bab 6663 __e1000_shutdown(pdev, false);
bc7f75fa
AK		 6664}
6665
6666#ifdef CONFIG_NET_POLL_CONTROLLER
147b2c8c 6667
8bb62869 6668static irqreturn_t e1000_intr_msix(int __always_unused irq, void *data)
147b2c8c
DD		 6669{
6670 struct net_device *netdev = data;
6671 struct e1000_adapter *adapter = netdev_priv(netdev);
147b2c8c
DD		 6672
6673 if (adapter->msix_entries) {
90da0669
BA		 6674 int vector, msix_irq;
6675
147b2c8c
DD		 6676 vector = 0;
6677 msix_irq = adapter->msix_entries[vector].vector;
6678 disable_irq(msix_irq);
6679 e1000_intr_msix_rx(msix_irq, netdev);
6680 enable_irq(msix_irq);
6681
6682 vector++;
6683 msix_irq = adapter->msix_entries[vector].vector;
6684 disable_irq(msix_irq);
6685 e1000_intr_msix_tx(msix_irq, netdev);
6686 enable_irq(msix_irq);
6687
6688 vector++;
6689 msix_irq = adapter->msix_entries[vector].vector;
6690 disable_irq(msix_irq);
6691 e1000_msix_other(msix_irq, netdev);
6692 enable_irq(msix_irq);
6693 }
6694
6695 return IRQ_HANDLED;
6696}
6697
e921eb1a
BA		 6698/**
6699 * e1000_netpoll
6700 * @netdev: network interface device structure
6701 *
bc7f75fa
AK		 6702 * Polling 'interrupt' - used by things like netconsole to send skbs
6703 * without having to re-enable interrupts. It's not called while
6704 * the interrupt routine is executing.
6705 */
6706static void e1000_netpoll(struct net_device *netdev)
6707{
6708 struct e1000_adapter *adapter = netdev_priv(netdev);
6709
147b2c8c
DD		 6710 switch (adapter->int_mode) {
6711 case E1000E_INT_MODE_MSIX:
6712 e1000_intr_msix(adapter->pdev->irq, netdev);
6713 break;
6714 case E1000E_INT_MODE_MSI:
6715 disable_irq(adapter->pdev->irq);
6716 e1000_intr_msi(adapter->pdev->irq, netdev);
6717 enable_irq(adapter->pdev->irq);
6718 break;
e80bd1d1 6719 default: /* E1000E_INT_MODE_LEGACY */
147b2c8c
DD		 6720 disable_irq(adapter->pdev->irq);
6721 e1000_intr(adapter->pdev->irq, netdev);
6722 enable_irq(adapter->pdev->irq);
6723 break;
6724 }
bc7f75fa
AK		 6725}
6726#endif
6727
6728/**
6729 * e1000_io_error_detected - called when PCI error is detected
6730 * @pdev: Pointer to PCI device
6731 * @state: The current pci connection state
6732 *
6733 * This function is called after a PCI bus error affecting
6734 * this device has been detected.
6735 */
6736static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
6737 pci_channel_state_t state)
6738{
6739 struct net_device *netdev = pci_get_drvdata(pdev);
6740 struct e1000_adapter *adapter = netdev_priv(netdev);
6741
6742 netif_device_detach(netdev);
6743
c93b5a76
MM		 6744 if (state == pci_channel_io_perm_failure)
6745 return PCI_ERS_RESULT_DISCONNECT;
6746
bc7f75fa 6747 if (netif_running(netdev))
28002099 6748 e1000e_down(adapter, true);
bc7f75fa
AK		 6749 pci_disable_device(pdev);
6750
6751 /* Request a slot slot reset. */
6752 return PCI_ERS_RESULT_NEED_RESET;
6753}
6754
6755/**
6756 * e1000_io_slot_reset - called after the pci bus has been reset.
6757 * @pdev: Pointer to PCI device
6758 *
6759 * Restart the card from scratch, as if from a cold-boot. Implementation
28002099 6760 * resembles the first-half of the e1000e_pm_resume routine.
bc7f75fa
AK		 6761 */
6762static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
6763{
6764 struct net_device *netdev = pci_get_drvdata(pdev);
6765 struct e1000_adapter *adapter = netdev_priv(netdev);
6766 struct e1000_hw *hw = &adapter->hw;
78cd29d5 6767 u16 aspm_disable_flag = 0;
6e4f6f6b 6768 int err;
111b9dc5 6769 pci_ers_result_t result;
bc7f75fa 6770
78cd29d5
BA		 6771 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S)
6772 aspm_disable_flag = PCIE_LINK_STATE_L0S;
6f461f6c 6773 if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
78cd29d5
BA		 6774 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6775 if (aspm_disable_flag)
2758f9ed 6776 e1000e_disable_aspm_locked(pdev, aspm_disable_flag);
78cd29d5 6777
f0f422e5 6778 err = pci_enable_device_mem(pdev);
6e4f6f6b 6779 if (err) {
bc7f75fa
AK		 6780 dev_err(&pdev->dev,
6781 "Cannot re-enable PCI device after reset.\n");
111b9dc5
JB		 6782 result = PCI_ERS_RESULT_DISCONNECT;
6783 } else {
23606cf5 6784 pdev->state_saved = true;
111b9dc5 6785 pci_restore_state(pdev);
66148bab 6786 pci_set_master(pdev);
bc7f75fa 6787
111b9dc5
JB		 6788 pci_enable_wake(pdev, PCI_D3hot, 0);
6789 pci_enable_wake(pdev, PCI_D3cold, 0);
bc7f75fa 6790
111b9dc5
JB		 6791 e1000e_reset(adapter);
6792 ew32(WUS, ~0);
6793 result = PCI_ERS_RESULT_RECOVERED;
6794 }
bc7f75fa 6795
111b9dc5
JB		 6796 pci_cleanup_aer_uncorrect_error_status(pdev);
6797
6798 return result;
bc7f75fa
AK		 6799}
6800
6801/**
6802 * e1000_io_resume - called when traffic can start flowing again.
6803 * @pdev: Pointer to PCI device
6804 *
6805 * This callback is called when the error recovery driver tells us that
6806 * its OK to resume normal operation. Implementation resembles the
28002099 6807 * second-half of the e1000e_pm_resume routine.
bc7f75fa
AK		 6808 */
6809static void e1000_io_resume(struct pci_dev *pdev)
6810{
6811 struct net_device *netdev = pci_get_drvdata(pdev);
6812 struct e1000_adapter *adapter = netdev_priv(netdev);
6813
cd791618 6814 e1000_init_manageability_pt(adapter);
bc7f75fa 6815
386164d9
AD		 6816 if (netif_running(netdev))
6817 e1000e_up(adapter);
bc7f75fa
AK		 6818
6819 netif_device_attach(netdev);
6820
e921eb1a 6821 /* If the controller has AMT, do not set DRV_LOAD until the interface
bc7f75fa 6822 * is up. For all other cases, let the f/w know that the h/w is now
ad68076e
BA		 6823 * under the control of the driver.
6824 */
c43bc57e 6825 if (!(adapter->flags & FLAG_HAS_AMT))
31dbe5b4 6826 e1000e_get_hw_control(adapter);
bc7f75fa
AK		 6827}
6828
6829static void e1000_print_device_info(struct e1000_adapter *adapter)
6830{
6831 struct e1000_hw *hw = &adapter->hw;
6832 struct net_device *netdev = adapter->netdev;
073287c0
BA		 6833 u32 ret_val;
6834 u8 pba_str[E1000_PBANUM_LENGTH];
bc7f75fa
AK		 6835
6836 /* print bus type/speed/width info */
a5cc7642 6837 e_info("(PCI Express:2.5GT/s:%s) %pM\n",
44defeb3
JK		 6838 /* bus width */
6839 ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
f0ff4398 6840 "Width x1"),
44defeb3 6841 /* MAC address */
7c510e4b 6842 netdev->dev_addr);
44defeb3
JK		 6843 e_info("Intel(R) PRO/%s Network Connection\n",
6844 (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000");
073287c0
BA		 6845 ret_val = e1000_read_pba_string_generic(hw, pba_str,
6846 E1000_PBANUM_LENGTH);
6847 if (ret_val)
f2315bf1 6848 strlcpy((char *)pba_str, "Unknown", sizeof(pba_str));
073287c0
BA		 6849 e_info("MAC: %d, PHY: %d, PBA No: %s\n",
6850 hw->mac.type, hw->phy.type, pba_str);
bc7f75fa
AK		 6851}
6852
10aa4c04
AK		 6853static void e1000_eeprom_checks(struct e1000_adapter *adapter)
6854{
6855 struct e1000_hw *hw = &adapter->hw;
6856 int ret_val;
6857 u16 buf = 0;
6858
6859 if (hw->mac.type != e1000_82573)
6860 return;
6861
6862 ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf);
e885d762
BA		 6863 le16_to_cpus(&buf);
6864 if (!ret_val && (!(buf & (1 << 0)))) {
10aa4c04 6865 /* Deep Smart Power Down (DSPD) */
6c2a9efa
FP		 6866 dev_warn(&adapter->pdev->dev,
6867 "Warning: detected DSPD enabled in EEPROM\n");
10aa4c04 6868 }
10aa4c04
AK		 6869}
6870
55e7fe5b
AD		 6871static netdev_features_t e1000_fix_features(struct net_device *netdev,
6872 netdev_features_t features)
6873{
6874 struct e1000_adapter *adapter = netdev_priv(netdev);
6875 struct e1000_hw *hw = &adapter->hw;
6876
6877 /* Jumbo frame workaround on 82579 and newer requires CRC be stripped */
6878 if ((hw->mac.type >= e1000_pch2lan) && (netdev->mtu > ETH_DATA_LEN))
6879 features &= ~NETIF_F_RXFCS;
6880
6881 return features;
6882}
6883
c8f44aff 6884static int e1000_set_features(struct net_device *netdev,
70495a50 6885 netdev_features_t features)
dc221294
BA		 6886{
6887 struct e1000_adapter *adapter = netdev_priv(netdev);
c8f44aff 6888 netdev_features_t changed = features ^ netdev->features;
dc221294
BA		 6889
6890 if (changed & (NETIF_F_TSO | NETIF_F_TSO6))
6891 adapter->flags |= FLAG_TSO_FORCE;
6892
f646968f 6893 if (!(changed & (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX |
cf955e6c
BG		 6894 NETIF_F_RXCSUM | NETIF_F_RXHASH | NETIF_F_RXFCS |
6895 NETIF_F_RXALL)))
dc221294
BA		 6896 return 0;
6897
0184039a
BG		 6898 if (changed & NETIF_F_RXFCS) {
6899 if (features & NETIF_F_RXFCS) {
6900 adapter->flags2 &= ~FLAG2_CRC_STRIPPING;
6901 } else {
6902 /* We need to take it back to defaults, which might mean
6903 * stripping is still disabled at the adapter level.
6904 */
6905 if (adapter->flags2 & FLAG2_DFLT_CRC_STRIPPING)
6906 adapter->flags2 |= FLAG2_CRC_STRIPPING;
6907 else
6908 adapter->flags2 &= ~FLAG2_CRC_STRIPPING;
6909 }
6910 }
6911
70495a50
BA		 6912 netdev->features = features;
6913
dc221294
BA		 6914 if (netif_running(netdev))
6915 e1000e_reinit_locked(adapter);
6916 else
6917 e1000e_reset(adapter);
6918
6919 return 0;
6920}
6921
651c2466 6922static const struct net_device_ops e1000e_netdev_ops = {
d5ea45da
SA		 6923 .ndo_open = e1000e_open,
6924 .ndo_stop = e1000e_close,
00829823 6925 .ndo_start_xmit = e1000_xmit_frame,
67fd4fcb 6926 .ndo_get_stats64 = e1000e_get_stats64,
ef9b965a 6927 .ndo_set_rx_mode = e1000e_set_rx_mode,
651c2466
SH		 6928 .ndo_set_mac_address = e1000_set_mac,
6929 .ndo_change_mtu = e1000_change_mtu,
6930 .ndo_do_ioctl = e1000_ioctl,
6931 .ndo_tx_timeout = e1000_tx_timeout,
6932 .ndo_validate_addr = eth_validate_addr,
6933
651c2466
SH		 6934 .ndo_vlan_rx_add_vid = e1000_vlan_rx_add_vid,
6935 .ndo_vlan_rx_kill_vid = e1000_vlan_rx_kill_vid,
6936#ifdef CONFIG_NET_POLL_CONTROLLER
6937 .ndo_poll_controller = e1000_netpoll,
6938#endif
dc221294 6939 .ndo_set_features = e1000_set_features,
55e7fe5b 6940 .ndo_fix_features = e1000_fix_features,
f2701b18 6941 .ndo_features_check = passthru_features_check,
651c2466
SH		 6942};
6943
bc7f75fa
AK		 6944/**
6945 * e1000_probe - Device Initialization Routine
6946 * @pdev: PCI device information struct
6947 * @ent: entry in e1000_pci_tbl
6948 *
6949 * Returns 0 on success, negative on failure
6950 *
6951 * e1000_probe initializes an adapter identified by a pci_dev structure.
6952 * The OS initialization, configuring of the adapter private structure,
6953 * and a hardware reset occur.
6954 **/
1dd06ae8 6955static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
bc7f75fa
AK		 6956{
6957 struct net_device *netdev;
6958 struct e1000_adapter *adapter;
6959 struct e1000_hw *hw;
6960 const struct e1000_info *ei = e1000_info_tbl[ent->driver_data];
f47e81fc
BB		 6961 resource_size_t mmio_start, mmio_len;
6962 resource_size_t flash_start, flash_len;
bc7f75fa 6963 static int cards_found;
78cd29d5 6964 u16 aspm_disable_flag = 0;
17e813ec 6965 int bars, i, err, pci_using_dac;
bc7f75fa
AK		 6966 u16 eeprom_data = 0;
6967 u16 eeprom_apme_mask = E1000_EEPROM_APME;
491a04d2 6968 s32 rval = 0;
bc7f75fa 6969
78cd29d5
BA		 6970 if (ei->flags2 & FLAG2_DISABLE_ASPM_L0S)
6971 aspm_disable_flag = PCIE_LINK_STATE_L0S;
6f461f6c 6972 if (ei->flags2 & FLAG2_DISABLE_ASPM_L1)
78cd29d5
BA		 6973 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6974 if (aspm_disable_flag)
6975 e1000e_disable_aspm(pdev, aspm_disable_flag);
6e4f6f6b 6976
f0f422e5 6977 err = pci_enable_device_mem(pdev);
bc7f75fa
AK		 6978 if (err)
6979 return err;
6980
6981 pci_using_dac = 0;
718a39eb 6982 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
bc7f75fa 6983 if (!err) {
718a39eb 6984 pci_using_dac = 1;
bc7f75fa 6985 } else {
718a39eb 6986 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
bc7f75fa 6987 if (err) {
718a39eb
RK		 6988 dev_err(&pdev->dev,
6989 "No usable DMA configuration, aborting\n");
6990 goto err_dma;
bc7f75fa
AK		 6991 }
6992 }
6993
17e813ec
BA		 6994 bars = pci_select_bars(pdev, IORESOURCE_MEM);
6995 err = pci_request_selected_regions_exclusive(pdev, bars,
6996 e1000e_driver_name);
bc7f75fa
AK		 6997 if (err)
6998 goto err_pci_reg;
6999
68eac460 7000 /* AER (Advanced Error Reporting) hooks */
19d5afd4 7001 pci_enable_pcie_error_reporting(pdev);
68eac460 7002
bc7f75fa 7003 pci_set_master(pdev);
438b365a
BA		 7004 /* PCI config space info */
7005 err = pci_save_state(pdev);
7006 if (err)
7007 goto err_alloc_etherdev;
bc7f75fa
AK		 7008
7009 err = -ENOMEM;
7010 netdev = alloc_etherdev(sizeof(struct e1000_adapter));
7011 if (!netdev)
7012 goto err_alloc_etherdev;
7013
bc7f75fa
AK		 7014 SET_NETDEV_DEV(netdev, &pdev->dev);
7015
f85e4dfa
TH		 7016 netdev->irq = pdev->irq;
7017
bc7f75fa
AK		 7018 pci_set_drvdata(pdev, netdev);
7019 adapter = netdev_priv(netdev);
7020 hw = &adapter->hw;
7021 adapter->netdev = netdev;
7022 adapter->pdev = pdev;
7023 adapter->ei = ei;
7024 adapter->pba = ei->pba;
7025 adapter->flags = ei->flags;
eb7c3adb 7026 adapter->flags2 = ei->flags2;
bc7f75fa
AK		 7027 adapter->hw.adapter = adapter;
7028 adapter->hw.mac.type = ei->mac;
2adc55c9 7029 adapter->max_hw_frame_size = ei->max_hw_frame_size;
b3f4d599 7030 adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
bc7f75fa
AK		 7031
7032 mmio_start = pci_resource_start(pdev, 0);
7033 mmio_len = pci_resource_len(pdev, 0);
7034
7035 err = -EIO;
7036 adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
7037 if (!adapter->hw.hw_addr)
7038 goto err_ioremap;
7039
7040 if ((adapter->flags & FLAG_HAS_FLASH) &&
1103a631
YL		 7041 (pci_resource_flags(pdev, 1) & IORESOURCE_MEM) &&
7042 (hw->mac.type < e1000_pch_spt)) {
bc7f75fa
AK		 7043 flash_start = pci_resource_start(pdev, 1);
7044 flash_len = pci_resource_len(pdev, 1);
7045 adapter->hw.flash_address = ioremap(flash_start, flash_len);
7046 if (!adapter->hw.flash_address)
7047 goto err_flashmap;
7048 }
7049
d495bcb8
BA		 7050 /* Set default EEE advertisement */
7051 if (adapter->flags2 & FLAG2_HAS_EEE)
7052 adapter->eee_advert = MDIO_EEE_100TX | MDIO_EEE_1000T;
7053
bc7f75fa 7054 /* construct the net_device struct */
e80bd1d1 7055 netdev->netdev_ops = &e1000e_netdev_ops;
bc7f75fa 7056 e1000e_set_ethtool_ops(netdev);
e80bd1d1 7057 netdev->watchdog_timeo = 5 * HZ;
c58c8a78 7058 netif_napi_add(netdev, &adapter->napi, e1000e_poll, 64);
f2315bf1 7059 strlcpy(netdev->name, pci_name(pdev), sizeof(netdev->name));
bc7f75fa
AK		 7060
7061 netdev->mem_start = mmio_start;
7062 netdev->mem_end = mmio_start + mmio_len;
7063
7064 adapter->bd_number = cards_found++;
7065
4662e82b
BA		 7066 e1000e_check_options(adapter);
7067
bc7f75fa
AK		 7068 /* setup adapter struct */
7069 err = e1000_sw_init(adapter);
7070 if (err)
7071 goto err_sw_init;
7072
bc7f75fa
AK		 7073 memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
7074 memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
7075 memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
7076
69e3fd8c 7077 err = ei->get_variants(adapter);
bc7f75fa
AK		 7078 if (err)
7079 goto err_hw_init;
7080
4a770358 7081 if ((adapter->flags & FLAG_IS_ICH) &&
152c0a97
YL		 7082 (adapter->flags & FLAG_READ_ONLY_NVM) &&
7083 (hw->mac.type < e1000_pch_spt))
4a770358
BA		 7084 e1000e_write_protect_nvm_ich8lan(&adapter->hw);
7085
bc7f75fa
AK		 7086 hw->mac.ops.get_bus_info(&adapter->hw);
7087
318a94d6 7088 adapter->hw.phy.autoneg_wait_to_complete = 0;
bc7f75fa
AK		 7089
7090 /* Copper options */
318a94d6 7091 if (adapter->hw.phy.media_type == e1000_media_type_copper) {
bc7f75fa
AK		 7092 adapter->hw.phy.mdix = AUTO_ALL_MODES;
7093 adapter->hw.phy.disable_polarity_correction = 0;
7094 adapter->hw.phy.ms_type = e1000_ms_hw_default;
7095 }
7096
470a5420 7097 if (hw->phy.ops.check_reset_block && hw->phy.ops.check_reset_block(hw))
185095fb
BA		 7098 dev_info(&pdev->dev,
7099 "PHY reset is blocked due to SOL/IDER session.\n");
bc7f75fa 7100
dc221294
BA		 7101 /* Set initial default active device features */
7102 netdev->features = (NETIF_F_SG |
f646968f
PM		 7103 NETIF_F_HW_VLAN_CTAG_RX |
7104 NETIF_F_HW_VLAN_CTAG_TX |
dc221294
BA		 7105 NETIF_F_TSO |
7106 NETIF_F_TSO6 |
70495a50 7107 NETIF_F_RXHASH |
dc221294
BA		 7108 NETIF_F_RXCSUM |
7109 NETIF_F_HW_CSUM);
7110
7111 /* Set user-changeable features (subset of all device features) */
7112 netdev->hw_features = netdev->features;
0184039a 7113 netdev->hw_features |= NETIF_F_RXFCS;
943146de 7114 netdev->priv_flags |= IFF_SUPP_NOFCS;
cf955e6c 7115 netdev->hw_features |= NETIF_F_RXALL;
bc7f75fa
AK		 7116
7117 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
f646968f 7118 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
bc7f75fa 7119
dc221294
BA		 7120 netdev->vlan_features |= (NETIF_F_SG |
7121 NETIF_F_TSO |
7122 NETIF_F_TSO6 |
7123 NETIF_F_HW_CSUM);
a5136e23 7124
ef9b965a
JB		 7125 netdev->priv_flags |= IFF_UNICAST_FLT;
7126
7b872a55 7127 if (pci_using_dac) {
bc7f75fa 7128 netdev->features |= NETIF_F_HIGHDMA;
7b872a55
YZ		 7129 netdev->vlan_features |= NETIF_F_HIGHDMA;
7130 }
bc7f75fa 7131
bc7f75fa
AK		 7132 if (e1000e_enable_mng_pass_thru(&adapter->hw))
7133 adapter->flags |= FLAG_MNG_PT_ENABLED;
7134
e921eb1a 7135 /* before reading the NVM, reset the controller to
ad68076e
BA		 7136 * put the device in a known good starting state
7137 */
bc7f75fa
AK		 7138 adapter->hw.mac.ops.reset_hw(&adapter->hw);
7139
e921eb1a 7140 /* systems with ASPM and others may see the checksum fail on the first
bc7f75fa
AK		 7141 * attempt. Let's give it a few tries
7142 */
7143 for (i = 0;; i++) {
7144 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0)
7145 break;
7146 if (i == 2) {
185095fb 7147 dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n");
bc7f75fa
AK		 7148 err = -EIO;
7149 goto err_eeprom;
7150 }
7151 }
7152
10aa4c04
AK		 7153 e1000_eeprom_checks(adapter);
7154
608f8a0d 7155 /* copy the MAC address */
bc7f75fa 7156 if (e1000e_read_mac_addr(&adapter->hw))
185095fb
BA		 7157 dev_err(&pdev->dev,
7158 "NVM Read Error while reading MAC address\n");
bc7f75fa
AK		 7159
7160 memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
bc7f75fa 7161
aaeb6cdf 7162 if (!is_valid_ether_addr(netdev->dev_addr)) {
185095fb 7163 dev_err(&pdev->dev, "Invalid MAC Address: %pM\n",
aaeb6cdf 7164 netdev->dev_addr);
bc7f75fa
AK		 7165 err = -EIO;
7166 goto err_eeprom;
7167 }
7168
7169 init_timer(&adapter->watchdog_timer);
c061b18d 7170 adapter->watchdog_timer.function = e1000_watchdog;
53aa82da 7171 adapter->watchdog_timer.data = (unsigned long)adapter;
bc7f75fa
AK		 7172
7173 init_timer(&adapter->phy_info_timer);
c061b18d 7174 adapter->phy_info_timer.function = e1000_update_phy_info;
53aa82da 7175 adapter->phy_info_timer.data = (unsigned long)adapter;
bc7f75fa
AK		 7176
7177 INIT_WORK(&adapter->reset_task, e1000_reset_task);
7178 INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
a8f88ff5
JB		 7179 INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
7180 INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
41cec6f1 7181 INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang);
bc7f75fa 7182
bc7f75fa
AK		 7183 /* Initialize link parameters. User can change them with ethtool */
7184 adapter->hw.mac.autoneg = 1;
3db1cd5c 7185 adapter->fc_autoneg = true;
5c48ef3e
BA		 7186 adapter->hw.fc.requested_mode = e1000_fc_default;
7187 adapter->hw.fc.current_mode = e1000_fc_default;
bc7f75fa
AK		 7188 adapter->hw.phy.autoneg_advertised = 0x2f;
7189
e921eb1a 7190 /* Initial Wake on LAN setting - If APM wake is enabled in
bc7f75fa
AK		 7191 * the EEPROM, enable the ACPI Magic Packet filter
7192 */
7193 if (adapter->flags & FLAG_APME_IN_WUC) {
7194 /* APME bit in EEPROM is mapped to WUC.APME */
7195 eeprom_data = er32(WUC);
7196 eeprom_apme_mask = E1000_WUC_APME;
4def99bb
BA		 7197 if ((hw->mac.type > e1000_ich10lan) &&
7198 (eeprom_data & E1000_WUC_PHY_WAKE))
a4f58f54 7199 adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP;
bc7f75fa
AK		 7200 } else if (adapter->flags & FLAG_APME_IN_CTRL3) {
7201 if (adapter->flags & FLAG_APME_CHECK_PORT_B &&
7202 (adapter->hw.bus.func == 1))
491a04d2
DE		 7203 rval = e1000_read_nvm(&adapter->hw,
7204 NVM_INIT_CONTROL3_PORT_B,
7205 1, &eeprom_data);
bc7f75fa 7206 else
491a04d2
DE		 7207 rval = e1000_read_nvm(&adapter->hw,
7208 NVM_INIT_CONTROL3_PORT_A,
7209 1, &eeprom_data);
bc7f75fa
AK		 7210 }
7211
7212 /* fetch WoL from EEPROM */
491a04d2
DE		 7213 if (rval)
7214 e_dbg("NVM read error getting WoL initial values: %d\n", rval);
7215 else if (eeprom_data & eeprom_apme_mask)
bc7f75fa
AK		 7216 adapter->eeprom_wol |= E1000_WUFC_MAG;
7217
e921eb1a 7218 /* now that we have the eeprom settings, apply the special cases
bc7f75fa
AK		 7219 * where the eeprom may be wrong or the board simply won't support
7220 * wake on lan on a particular port
7221 */
7222 if (!(adapter->flags & FLAG_HAS_WOL))
7223 adapter->eeprom_wol = 0;
7224
7225 /* initialize the wol settings based on the eeprom settings */
7226 adapter->wol = adapter->eeprom_wol;
66148bab
KK		 7227
7228 /* make sure adapter isn't asleep if manageability is enabled */
7229 if (adapter->wol || (adapter->flags & FLAG_MNG_PT_ENABLED) ||
7230 (hw->mac.ops.check_mng_mode(hw)))
7231 device_wakeup_enable(&pdev->dev);
bc7f75fa 7232
84527590 7233 /* save off EEPROM version number */
491a04d2
DE		 7234 rval = e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers);
7235
7236 if (rval) {
7237 e_dbg("NVM read error getting EEPROM version: %d\n", rval);
7238 adapter->eeprom_vers = 0;
7239 }
84527590 7240
bc7f75fa
AK		 7241 /* reset the hardware with the new settings */
7242 e1000e_reset(adapter);
7243
e921eb1a 7244 /* If the controller has AMT, do not set DRV_LOAD until the interface
bc7f75fa 7245 * is up. For all other cases, let the f/w know that the h/w is now
ad68076e
BA		 7246 * under the control of the driver.
7247 */
c43bc57e 7248 if (!(adapter->flags & FLAG_HAS_AMT))
31dbe5b4 7249 e1000e_get_hw_control(adapter);
bc7f75fa 7250
f2315bf1 7251 strlcpy(netdev->name, "eth%d", sizeof(netdev->name));
bc7f75fa
AK		 7252 err = register_netdev(netdev);
7253 if (err)
7254 goto err_register;
7255
9c563d20
JB		 7256 /* carrier off reporting is important to ethtool even BEFORE open */
7257 netif_carrier_off(netdev);
7258
d89777bf
BA		 7259 /* init PTP hardware clock */
7260 e1000e_ptp_init(adapter);
7261
bc7f75fa
AK		 7262 e1000_print_device_info(adapter);
7263
f3ec4f87
AS		 7264 if (pci_dev_run_wake(pdev))
7265 pm_runtime_put_noidle(&pdev->dev);
23606cf5 7266
bc7f75fa
AK		 7267 return 0;
7268
7269err_register:
c43bc57e 7270 if (!(adapter->flags & FLAG_HAS_AMT))
31dbe5b4 7271 e1000e_release_hw_control(adapter);
bc7f75fa 7272err_eeprom:
470a5420 7273 if (hw->phy.ops.check_reset_block && !hw->phy.ops.check_reset_block(hw))
bc7f75fa 7274 e1000_phy_hw_reset(&adapter->hw);
c43bc57e 7275err_hw_init:
bc7f75fa
AK		 7276 kfree(adapter->tx_ring);
7277 kfree(adapter->rx_ring);
7278err_sw_init:
1103a631 7279 if ((adapter->hw.flash_address) && (hw->mac.type < e1000_pch_spt))
c43bc57e 7280 iounmap(adapter->hw.flash_address);
e82f54ba 7281 e1000e_reset_interrupt_capability(adapter);
c43bc57e 7282err_flashmap:
bc7f75fa
AK		 7283 iounmap(adapter->hw.hw_addr);
7284err_ioremap:
7285 free_netdev(netdev);
7286err_alloc_etherdev:
f0f422e5 7287 pci_release_selected_regions(pdev,
f0ff4398 7288 pci_select_bars(pdev, IORESOURCE_MEM));
bc7f75fa
AK		 7289err_pci_reg:
7290err_dma:
7291 pci_disable_device(pdev);
7292 return err;
7293}
7294
7295/**
7296 * e1000_remove - Device Removal Routine
7297 * @pdev: PCI device information struct
7298 *
7299 * e1000_remove is called by the PCI subsystem to alert the driver
7300 * that it should release a PCI device. The could be caused by a
7301 * Hot-Plug event, or because the driver is going to be removed from
7302 * memory.
7303 **/
9f9a12f8 7304static void e1000_remove(struct pci_dev *pdev)
bc7f75fa
AK		 7305{
7306 struct net_device *netdev = pci_get_drvdata(pdev);
7307 struct e1000_adapter *adapter = netdev_priv(netdev);
23606cf5
RW		 7308 bool down = test_bit(__E1000_DOWN, &adapter->state);
7309
d89777bf
BA		 7310 e1000e_ptp_remove(adapter);
7311
e921eb1a 7312 /* The timers may be rescheduled, so explicitly disable them
23f333a2 7313 * from being rescheduled.
ad68076e 7314 */
23606cf5
RW		 7315 if (!down)
7316 set_bit(__E1000_DOWN, &adapter->state);
bc7f75fa
AK		 7317 del_timer_sync(&adapter->watchdog_timer);
7318 del_timer_sync(&adapter->phy_info_timer);
7319
41cec6f1
BA		 7320 cancel_work_sync(&adapter->reset_task);
7321 cancel_work_sync(&adapter->watchdog_task);
7322 cancel_work_sync(&adapter->downshift_task);
7323 cancel_work_sync(&adapter->update_phy_task);
7324 cancel_work_sync(&adapter->print_hang_task);
bc7f75fa 7325
b67e1913
BA		 7326 if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) {
7327 cancel_work_sync(&adapter->tx_hwtstamp_work);
7328 if (adapter->tx_hwtstamp_skb) {
7329 dev_kfree_skb_any(adapter->tx_hwtstamp_skb);
7330 adapter->tx_hwtstamp_skb = NULL;
7331 }
7332 }
7333
23606cf5
RW		 7334 /* Don't lie to e1000_close() down the road. */
7335 if (!down)
7336 clear_bit(__E1000_DOWN, &adapter->state);
17f208de
BA		 7337 unregister_netdev(netdev);
7338
f3ec4f87
AS		 7339 if (pci_dev_run_wake(pdev))
7340 pm_runtime_get_noresume(&pdev->dev);
23606cf5 7341
e921eb1a 7342 /* Release control of h/w to f/w. If f/w is AMT enabled, this
ad68076e
BA		 7343 * would have already happened in close and is redundant.
7344 */
31dbe5b4 7345 e1000e_release_hw_control(adapter);
bc7f75fa 7346
4662e82b 7347 e1000e_reset_interrupt_capability(adapter);
bc7f75fa
AK		 7348 kfree(adapter->tx_ring);
7349 kfree(adapter->rx_ring);
7350
7351 iounmap(adapter->hw.hw_addr);
1103a631
YL		 7352 if ((adapter->hw.flash_address) &&
7353 (adapter->hw.mac.type < e1000_pch_spt))
bc7f75fa 7354 iounmap(adapter->hw.flash_address);
f0f422e5 7355 pci_release_selected_regions(pdev,
f0ff4398 7356 pci_select_bars(pdev, IORESOURCE_MEM));
bc7f75fa
AK		 7357
7358 free_netdev(netdev);
7359
111b9dc5 7360 /* AER disable */
19d5afd4 7361 pci_disable_pcie_error_reporting(pdev);
111b9dc5 7362
bc7f75fa
AK		 7363 pci_disable_device(pdev);
7364}
7365
7366/* PCI Error Recovery (ERS) */
3646f0e5 7367static const struct pci_error_handlers e1000_err_handler = {
bc7f75fa
AK		 7368 .error_detected = e1000_io_error_detected,
7369 .slot_reset = e1000_io_slot_reset,
7370 .resume = e1000_io_resume,
7371};
7372
0e8e842b 7373static const struct pci_device_id e1000_pci_tbl[] = {
bc7f75fa
AK		 7374 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 },
7375 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 },
7376 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 },
c29c3ba5
BA		 7377 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP),
7378 board_82571 },
bc7f75fa
AK		 7379 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 },
7380 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 },
040babf9
AK		 7381 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 },
7382 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 },
7383 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 },
ad68076e 7384
bc7f75fa
AK		 7385 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 },
7386 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 },
7387 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 },
7388 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 },
ad68076e 7389
bc7f75fa
AK		 7390 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 },
7391 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 },
7392 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 },
ad68076e 7393
4662e82b 7394 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 },
bef28b11 7395 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 },
8c81c9c3 7396 { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 },
4662e82b 7397
bc7f75fa
AK		 7398 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT),
7399 board_80003es2lan },
7400 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT),
7401 board_80003es2lan },
7402 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT),
7403 board_80003es2lan },
7404 { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT),
7405 board_80003es2lan },
ad68076e 7406
bc7f75fa
AK		 7407 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan },
7408 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan },
7409 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan },
7410 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan },
7411 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan },
7412 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan },
7413 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan },
9e135a2e 7414 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_82567V_3), board_ich8lan },
ad68076e 7415
bc7f75fa
AK		 7416 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan },
7417 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan },
7418 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan },
7419 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan },
7420 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan },
2f15f9d6 7421 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan },
97ac8cae
BA		 7422 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan },
7423 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan },
7424 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan },
7425
7426 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan },
7427 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan },
7428 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan },
bc7f75fa 7429
f4187b56
BA		 7430 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan },
7431 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan },
10df0b91 7432 { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_V), board_ich10lan },
f4187b56 7433
a4f58f54
BA		 7434 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan },
7435 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan },
7436 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan },
7437 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan },
7438
d3738bb8
BA		 7439 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_LM), board_pch2lan },
7440 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_V), board_pch2lan },
7441
2fbe4526
BA		 7442 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_LM), board_pch_lpt },
7443 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_V), board_pch_lpt },
16e310ae
BA		 7444 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_LM), board_pch_lpt },
7445 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_V), board_pch_lpt },
91a3d82f
BA		 7446 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_LM2), board_pch_lpt },
7447 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_V2), board_pch_lpt },
7448 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_LM3), board_pch_lpt },
7449 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_I218_V3), board_pch_lpt },
79849ebc
DE		 7450 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_LM), board_pch_spt },
7451 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_V), board_pch_spt },
7452 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_LM2), board_pch_spt },
7453 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_V2), board_pch_spt },
f3ed935d 7454 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LBG_I219_LM3), board_pch_spt },
9cd34b3a
RA		 7455 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_LM4), board_pch_spt },
7456 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_V4), board_pch_spt },
7457 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_LM5), board_pch_spt },
7458 { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_SPT_I219_V5), board_pch_spt },
2fbe4526 7459
f36bb6ca 7460 { 0, 0, 0, 0, 0, 0, 0 } /* terminate list */
bc7f75fa
AK		 7461};
7462MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
7463
23606cf5 7464static const struct dev_pm_ops e1000_pm_ops = {
72f72dcc 7465#ifdef CONFIG_PM_SLEEP
28002099
DE		 7466 .suspend = e1000e_pm_suspend,
7467 .resume = e1000e_pm_resume,
7468 .freeze = e1000e_pm_freeze,
7469 .thaw = e1000e_pm_thaw,
7470 .poweroff = e1000e_pm_suspend,
7471 .restore = e1000e_pm_resume,
72f72dcc 7472#endif
63eb48f1
DE		 7473 SET_RUNTIME_PM_OPS(e1000e_pm_runtime_suspend, e1000e_pm_runtime_resume,
7474 e1000e_pm_runtime_idle)
23606cf5
RW		 7475};
7476
bc7f75fa
AK		 7477/* PCI Device API Driver */
7478static struct pci_driver e1000_driver = {
7479 .name = e1000e_driver_name,
7480 .id_table = e1000_pci_tbl,
7481 .probe = e1000_probe,
9f9a12f8 7482 .remove = e1000_remove,
f36bb6ca
BA		 7483 .driver = {
7484 .pm = &e1000_pm_ops,
7485 },
bc7f75fa
AK		 7486 .shutdown = e1000_shutdown,
7487 .err_handler = &e1000_err_handler
7488};
7489
7490/**
7491 * e1000_init_module - Driver Registration Routine
7492 *
7493 * e1000_init_module is the first routine called when the driver is
7494 * loaded. All it does is register with the PCI subsystem.
7495 **/
7496static int __init e1000_init_module(void)
7497{
8544b9f7
BA		 7498 pr_info("Intel(R) PRO/1000 Network Driver - %s\n",
7499 e1000e_driver_version);
529498cd 7500 pr_info("Copyright(c) 1999 - 2015 Intel Corporation.\n");
53ec5498 7501
5a5e889c 7502 return pci_register_driver(&e1000_driver);
bc7f75fa
AK		 7503}
7504module_init(e1000_init_module);
7505
7506/**
7507 * e1000_exit_module - Driver Exit Cleanup Routine
7508 *
7509 * e1000_exit_module is called just before the driver is removed
7510 * from memory.
7511 **/
7512static void __exit e1000_exit_module(void)
7513{
7514 pci_unregister_driver(&e1000_driver);
7515}
7516module_exit(e1000_exit_module);
7517
bc7f75fa
AK		 7518MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
7519MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
7520MODULE_LICENSE("GPL");
7521MODULE_VERSION(DRV_VERSION);
7522
06c24b91 7523/* netdev.c */
Linux kernel - Deliverables
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